6.5 Creedmoor

[Ex E6]

My Apologies for NOT being able to shoot previously loaded Test ladders with various powders and bullets .

It is COLDER than a Siberian Well diggers ass , with Dangerous Wind chills . I thought it was cold here at -10 this AM ,with our high supposedly making 12 Deg. ; It DIDN'T !. A friend called Me at 8:30 AM today ,to report 9" of new snow and -37 with NO wind !!.

All of You in and east of Wyoming ,HANG on too your shorts ; You're gonna NEED THEM !. I'll get em when the weather is more cooperative ,as for now I can't see the Target sheds ,let alone targets . Blizzard conditions in effect .

 

[JMGlasgow]

It's been cold in WY. Woke up to -22 without wind chill today.

 

[Rob01]

Loaded up some 153 ATips and took them out Thursday to test out in my rifle. I loaded up 5 of each of 39, 39.5, 40 and 40.5grns of H4350 in Hornady brass at .050” off lands or oal of 2.860”. All but the 40grn shot a small cluster but I was just looking for velocity and a place to start looking for a load. 40.5 gave me 2669fps in my 28” 8 twist Bartlein and very good 100 yard group so I loaded up 30 more and will be testing them at distance soon.

 

[ncyotecaller]

Loaded up some 153 ATips and took them out Thursday to test out in my rifle. I loaded up 5 of each of 39, 39.5, 40 and 40.5grns of H4350 in Hornady brass at .050” off lands or oal of 2.860”. All but the 40grn shot a small cluster but I was just looking for velocity and a place to start looking for a load. 40.5 gave me 2669fps in my 28” 8 twist Bartlein and very good 100 yard group so I loaded up 30 more and will be testing them at distance soon.

This was mine with 156gr Berger EOL’s last week with 40.5gr. This was shot 200-210 on the barrel.

 

[Rob01]

Right in that same area for velocity. I will shoot all 30 over the chrono when I go test so will get a better idea of SD but for the 5 I shot it was 3 so let’s hope it stays fairly low.

 

[ncyotecaller]

Right in that same area for velocity. I will shoot all 30 over the chrono when I go test so will get a better idea of SD but for the 5 I shot it was 3 so let’s hope it stays fairly low.

When I was on the zero range earlier in the day I fired 44 rounds over the Magnetospeed with an SD of 9.9. I know quite a few people shooting 6.5 with either 156gr or 153.5gr in competition and all of us are either at 40.5gr or 40.6gr with around an 80thou jump. I know myself and Andy Slade are using 7.5 twist barrels and I know Jake Vibbert uses a 8 twist with the 153gr A-Tips.

 

[derf64]

I'm going to jump down the rabbit hole of Coyote hunting. My weapon of choice is a 22'' gas gun in 6.5 CM. The Hornady 100gr ELD-m is the bullet that I'm gravitating toward, being pushed by R15. Any helpful thoughts to my present choices, Thank You.

 

[4O6shootist]

My Apologies for NOT being able to shoot previously loaded Test ladders with various powders and bullets .

It is COLDER than a Siberian Well diggers ass , with Dangerous Wind chills . I thought it was cold here at -10 this AM ,with our high supposedly making 12 Deg. ; It DIDN'T !. A friend called Me at 8:30 AM today ,to report 9" of new snow and -37 with NO wind !!.

All of You in and east of Wyoming ,HANG on too your shorts ; You're gonna NEED THEM !. I'll get em when the weather is more cooperative ,as for now I can't see the Target sheds ,let alone targets . Blizzard conditions in effect .

-33 ambient here early this am, -65 windchill. I love working nights in the Oilfield. I'm like a Siberian Vampire.

 

[Mr. Wolf]

When I was on the zero range earlier in the day I fired 44 rounds over the Magnetospeed with an SD of 9.9. I know quite a few people shooting 6.5 with either 156gr or 153.5gr in competition and all of us are either at 40.5gr or 40.6gr with around an 80thou jump. I know myself and Andy Slade are using 7.5 twist barrels and I know Jake Vibbert uses a 8 twist with the 153gr A-Tips.

Interesting info on these heavier bullet options.
Can I ask what type of competition they are shooting these heavier bullets in? PRS, NRL Hunter, ELR, combo of above?

Thanks in advance.

 

[ncyotecaller]

Interesting info on these heavier bullet options.
Can I ask what type of competition they are shooting these heavier bullets in? PRS, NRL Hunter, ELR, combo of above?

Thanks in advance.

I am going to be using them solely for PRS Pro Series matches and maybe a few Atlantic Coast Regional matches. I will mainly be using my 22 Creedmoor with Sierra 95gr SMK’s for the regional matches.

 

[CheapBasterd]

Im moving from Hornady Brass to Peterson Brass using 140gr ELD. I did end up with the easy button 41.5gr of H4350 (avg. 2674). Just wondering what others had to backdown to due to the decreased case capacity.

 

[ncyotecaller]

Im moving from Hornady Brass to Peterson Brass using 140gr ELD. I did end up with the easy button 41.5gr of H4350 (avg. 2674). Just wondering what others had to backdown to due to the decreased case capacity.

I’m getting 2675avg with Berger 156gr EOL, Lapua brass, 40.5gr H4350 and CCI 450’s. I’d say you have a ways you can still go.

 

[CheapBasterd]

I’m getting 2675avg with Berger 156gr EOL, Lapua brass, 40.5gr H4350 and CCI 450’s. I’d say you have a ways you can still go.

Sorry, I think my post was confusing. The 41.5gr of H4350 (avg. 2674) was with Hornady Brass. I've read the same powder charge used in virgin Peterson Brass could jump 90-100FPS.

I havent loaded any yet in the Peterson. Was just curious what others experience was with this combo. Maybe it will help me save a couple rounds by not starting off so low with the recommended "back off by 10%".

 

[Rob01]

Sorry, I think my post was confusing. The 41.5gr of H4350 (avg. 2674) was with Hornady Brass. I've read the same powder charge used in virgin Peterson Brass could jump 90-100FPS.

I havent loaded any yet in the Peterson. Was just curious what others experience was with this combo. Maybe it will help me save a couple rounds by not starting off so low with the recommended "back off by 10%".

How long is your barrel as that is super slow for 41.5grn and a 140?

 

[CheapBasterd]

How long is your barrel as that is super slow for 41.5grn and a 140?

24" Howa
Maybe due to the COL? 2.855"
Winchester Standard LRP

 

[Rob01]

24" Howa
Maybe due to the COL? 2.855"
Winchester Standard LRP

Probably just the barrel. I’d load up a couple at 40.5 with the new brass and work back up from there.

 

[Bbracken667]

Im moving from Hornady Brass to Peterson Brass using 140gr ELD. I did end up with the easy button 41.5gr of H4350 (avg. 2674). Just wondering what others had to backdown to due to the decreased case capacity.

I don’t know about Peterson brass (never used them) but Lapua brass has slightly less volume than Hornady, but holds up better to pressure so there is a trade off. I also use hBn on my bullets so my opinion/results are a bit more complex. The coating also allows for a higher charge. I run lower pressures as a result, still get decent MV’s and, I think, get more mileage from my brass and barrel. Hard to quantify or qualify that statement though lol

 

[Ex E6]

Not certain I buy into 90-100 fps increase just using another manufacturers case ?. I'd have to scrutinize case length and capacity with verification before leaning into that camp .

Has anyone ever seen " OFFICIAL " Manufacturers H2o case capacity listed anywhere ?. Would be nice if they all did just that ,so as to eliminate extreme variances ,I've seen posted all over the Net . Yes I've done MY own in 5.56 ,.308 7.62X51 and 63 not 6.5 CM as yet and may not .
Besides one can't use the entire cases volume ,as the projectile has to set in it. I'm liking VV powder and getting just over and under 2700 fps with 140's and 22.5" barrel . Accuracy is there if I do MY part and that's what counts for ME .

 

[Bbracken667]

Not certain I buy into 90-100 fps increase just using another manufacturers case ?. I'd have to scrutinize case length and capacity with verification before leaning into that camp .

Has anyone ever seen " OFFICIAL " Manufacturers H2o case capacity listed anywhere ?. Would be nice if they all did just that ,so as to eliminate extreme variances ,I've seen posted all over the Net . Yes I've done MY own in 5.56 ,.308 7.62X51 and 63 not 6.5 CM as yet and may not .
Besides one can't use the entire cases volume ,as the projectile has to set in it. I'm liking VV powder and getting just over and under 2700 fps with 140's and 22.5" barrel . Accuracy is there if I do MY part and that's what counts for ME .

Yeah, I have never seen “official” volume figures, I usually just do it like most people, using water.
I am loving VV as well. Do you use their recommended COL or do you load it long with extra powder?

 

[TCreedmoor]

Attached is a target from my last trip to the range. (sorry, I wrote the year as 2023 out of habit) I'm looking for comments/feedback on what might have caused the bizarre hole on circle #7. I was aiming at circle #4 and one of those five shots ended up making a boomerang shaped hole in circle #7. There was another large hole above my target as shown in the second photo. I experienced a similar impact back in last November. The hole was nearly identical, perhaps slightly larger and shaped more like a block letter 'C' than a boomerang.

Notes:

1. Rifle details: Savage Ashbury Precision Ordinance bolt action, 24" barrel, no muzzle brake, Magnetospeed chronograph attached to the chassis with an MK Machining mount. (ample clearance from the path of the bullet)
2. H4350, 40.5 grains, Hornady 140 ELD-Match bullets seated to a CBTO of 2.2405". This works out to be a COAL of 2.850".
3. Hornady once fired brass. Cleaned, trimmed, chamfered, deburred, and polished. Primed with CCI BR-2 primers.
4. Bullets are seated with an RCBS MatchMaster micrometer seating die.
5. These were not "factory second" bullets. These were part of six 100-round boxes purchased from a well known online reloading store in Texas.
6. No visible deviations were observed in the bullet ahead of time. I weigh and sort the bullets to the 0.1 grain. Each bullet is handled multiple times, during sorting, during seating, then when measuring the CBTO dimension with my calipers.
7. Muzzle velocities are in the range of 2640 ft/sec.
8. It was 23 F outside, but I was shooting from an indoor shooting bench with the barrel sticking out a small window. Ammo went from my home to a car in a heated garage to the semi-heated shooting room at the range.
9. The range's course of fire is to shoot for 23 minutes then take a 7 minute break to clear the firearms and allow people to walk out and check/replace their targets. During any one of these shooting intervals, I never fired more than about 12 shots at a reasonably slow pace.
10. After a shooting break I would fire at least one round at a different target to warm the barrel back up.
11. Circles #1 thru #5 are all 5-shot groups. The blue circles are 1" diameter.
12. The five rounds aimed at circle #4 ranged from 2659 to 2621. Assuming the boomerang was one of the last two rounds, it was either 2659 or 2621.
13. I think circle #4 was shot during the same shooting interval as circle 3. No more than 12 rounds during that 23 minute period.
14. There is zero chance the boomerang hole was caused by a different shooter, ricochet or splatter from a steel target.
15. The target backing was virgin when I hung my target -- no holes in it whatsoever. Notice large hole above where the paper target was.
16. The vertical stacking on circle #3 had velocities of 2631, 2640, 2622, 2617 and 2615. At 100 yards those velocities shouldn't explain the vertical dispersion. Circle 3 was shot after one of the breaks. There was at least one warm-up round fired at a separate target prior to this group.
17. Circle #8 was a 3-shot group with cartridges where the neck tension was so low I pulled the bullets out really far (prior to loading) so I was basically shooting with the bullet on the lands. (jam?)
18. My rifle's cold bore shot tends to shoot .75 MOA left. The 9 o'clock round on circle #8 was my warm-up round. The next two rounds make me want to consider "jam" for all my future reload seating depths.

I welcome any feedback regarding this target and my results.

 

[Ex E6]

Yeah, I have never seen “official” volume figures, I usually just do it like most people, using water.
I am loving VV as well. Do you use their recommended COL or do you load it long with extra powder?

I stay 0.020- 30" under MY chambers length in gas guns . For Bolt rifles generally 0.005-10" ,if using Barnes or copper bullets , 0.030-50" .
I saw someone who didn't heed Barnes recommendation and their Rifle WASN'T pretty . Operator was extremely lucky in minor injuries ,Rifle Totaled including stock . NO clue as to what he was running for loads but was either on the lands or so near bullet jumped and disaster struck .

 

[TheOfficeT-Rex]

I welcome any feedback regarding this target and my results.

My first thought was an endcap strike. Since you said no muzzle brake, grab a flashlight and double check your magneto bayonet, just to totally rule it out.

I'm assuming the red outlined photo is the backer- If you zoom in, the hole in the backer looks like it has lead powder around it. I've seen similar traces around bullet holes on paper when they start coming apart mid-flight. Mine were distinct 'comet tails,' but yours looks like a lot more powdered lead around the hole, which could happen if the core sheds the jacket.

How many rounds on the barrel, and how clean was it when you started?

 

[Bbracken667]

I stay 0.020- 30" under MY chambers length in gas guns . For Bolt rifles generally 0.005-10" ,if using Barnes or copper bullets , 0.030-50" .
I saw someone who didn't heed Barnes recommendation and their Rifle WASN'T pretty . Operator was extremely lucky in minor injuries ,Rifle Totaled including stock . NO clue as to what he was running for loads but was either on the lands or so near bullet jumped and disaster struck .

Gotcha. I am careful about that stuff. I prefer 20-30 thou off the lands, and I use the Hornady tool to find my lands. I also, because it just isn’t as reliable as I prefer, usually triple check for the lands, and I come back another day to check another 2-3 times. By then I have a pretty solid measurement to go by, so I don’t blow things up. I never have and don’t want to start now at 70 lol. Been reloading since mid 70’s ish. Don’t remember precisely when. I have never lost my respect for the forces involved.
That is one reason I tend to load longer as opposed to shorter. I keep it off the lands but longer than book. Less pressure but you can work your charge up safely.

 

[Bbracken667]

Gotcha. I am careful about that stuff. I prefer 20-30 thou off the lands, and I use the Hornady tool to find my lands. I also, because it just isn’t as reliable as I prefer, usually triple check for the lands, and I come back another day to check another 2-3 times. By then I have a pretty solid measurement to go by, so I don’t blow things up. I never have and don’t want to start now at 70 lol. Been reloading since mid 70’s ish. Don’t remember precisely when. I have never lost my respect for the forces involved.
That is one reason I tend to load longer as opposed to shorter. I keep it off the lands but longer than book. Less pressure but you can work your charge up safely.

Oh, and VV recommends 2.719 or something like that, whereas I normally load to somewhere around 2.85 for a 140 gn eldm. So I was curious if you had tried that length or not.

 

[TCreedmoor]

My first thought was an endcap strike. Since you said no muzzle brake, grab a flashlight and double check your magneto bayonet, just to totally rule it out.

I'm assuming the red outlined photo is the backer- If you zoom in, the hole in the backer looks like it has lead powder around it. I've seen similar traces around bullet holes on paper when they start coming apart mid-flight. Mine were distinct 'comet tails,' but yours looks like a lot more powdered lead around the hole, which could happen if the core sheds the jacket.

How many rounds on the barrel, and how clean was it when you started?

• I will recheck the Magnetospeed the next time I have the rifle set up at the range. After the boomerang round I pulled the bolt and looked down the barrel. I didn't see any signs of the Magnetospeed's bayonet, but then again, I didn't shine a light down the barrel or perform any other clearance dimension type testing.
• I did check and made sure the thread-protector cap was on tight.
• Yes the red outline photo is the backer. I included that photo because you can see lead marks on all the impacts, including the two boomerang shaped holes. Or are the black rings around bullet holes just powder marks?
• I've got around 1100 rounds through the rifle. Last cleaned about 100 rounds ago.

How common is it for Hornady 140 ELD-Match bullets to break apart in flight? I searched online earlier this week but did not find anything meaningful.

 

[TheOfficeT-Rex]

• I will recheck the Magnetospeed the next time I have the rifle set up at the range. After the boomerang round I pulled the bolt and looked down the barrel. I didn't see any signs of the Magnetospeed's bayonet, but then again, I didn't shine a light down the barrel or perform any other clearance dimension type testing.
• I did check and made sure the thread-protector cap was on tight.
• Yes the red outline photo is the backer. I included that photo because you can see lead marks on all the impacts, including the two boomerang shaped holes. Or are the black rings around bullet holes just powder marks?
• I've got around 1100 rounds through the rifle. Last cleaned about 100 rounds ago.

How common is it for Hornady 140 ELD-Match bullets to break apart in flight? I searched online earlier this week but did not find anything meaningful.

Check the magneto now and see if you have any skip marks.

I'm talking about the lead 'dusting' around the boomerang hole specifically, not the rings around the regular bullet holes that are nice and round.

I'm not sure how common on the 140s, but I've seen 147s go poof. There used to be video here.

 

[Rob01]

• I will recheck the Magnetospeed the next time I have the rifle set up at the range. After the boomerang round I pulled the bolt and looked down the barrel. I didn't see any signs of the Magnetospeed's bayonet, but then again, I didn't shine a light down the barrel or perform any other clearance dimension type testing.
• I did check and made sure the thread-protector cap was on tight.
• Yes the red outline photo is the backer. I included that photo because you can see lead marks on all the impacts, including the two boomerang shaped holes. Or are the black rings around bullet holes just powder marks?
• I've got around 1100 rounds through the rifle. Last cleaned about 100 rounds ago.

How common is it for Hornady 140 ELD-Match bullets to break apart in flight? I searched online earlier this week but did not find anything meaningful.

Have shot thousands of 140 elds in multiple rifles and never had one come apart. It must have hit something mid flight to do that. Were you aiming at that target when you saw it go in like that?

 

[TCreedmoor]

Have shot thousands of 140 elds in multiple rifles and never had one come apart. It must have hit something mid flight to do that. Were you aiming at that target when you saw it go in like that?

That entire 5-shot group was aimed at the red dot in the center of circle #4. The range has a clear path with no obstructions between the shooting bench and the targets.

 

[CheapBasterd]

Not certain I buy into 90-100 fps increase just using another manufacturers case ?. I'd have to scrutinize case length and capacity with verification before leaning into that camp .

Has anyone ever seen " OFFICIAL " Manufacturers H2o case capacity listed anywhere ?. Would be nice if they all did just that ,so as to eliminate extreme variances ,I've seen posted all over the Net . Yes I've done MY own in 5.56 ,.308 7.62X51 and 63 not 6.5 CM as yet and may not .
Besides one can't use the entire cases volume ,as the projectile has to set in it. I'm liking VV powder and getting just over and under 2700 fps with 140's and 22.5" barrel . Accuracy is there if I do MY part and that's what counts for ME .

Just got back from testing out the new brass. I worked my way up from 40.5gr

41.5gr H4350 in Peterson brass avg. 2718 fps
ES: 12
SD: 6

vs

41.5gr H4350 in Hornady brass avg. 2674 fps
ES: 34
SD: 12

44 fps difference and way better ES and SD from the Peterson Brass. Im sold..Well i already bought it but whatever, you know what I mean.

 

[TCreedmoor]

Check the magneto now and see if you have any skip marks.

I'm talking about the lead 'dusting' around the boomerang hole specifically, not the rings around the regular bullet holes that are nice and round.

I'm not sure how common on the 140s, but I've seen 147s go poof. There used to be video here.

I didn't know it at the time, but I was having intermittent Magnetospeed bayonet strikes over the Summer and Fall. Nothing of this magnitude. I'd shoot 1/2 MOA groups, then suddenly have 2 MOA groups, then back to 1/2 MOA all in the same afternoon. Every second or third trip to the range I might have rounds completely miss the target backer like they were going into a black hole. Then all of a sudden back to bullseyes. Just frequent enough to make me question all my reloading practices, shooting techniques, optic and barrel life. In early December I finally realized they were skimming the bayonet tip and readjusted the MK Machining mount to add extra clearance from the barrel and bullet path. The mount secures to a small piece of Picatinny rail on the chassis. The mount position is VERY repeatable. I will examine the bayonet clearance on my next trip to the range. I will also compare the bayonet to the photos I took in December when I discovered the marks.

 

[TheOfficeT-Rex]

I will also compare the bayonet to the photos I took in December when I discovered the marks.

Check just to rule it out.

The two extra large backer holes are curious. Here's a target snip from one of my old 6CM barrels - the lead comet tails made me suspect it was damaging jackets and I pulled it- the throat looked pretty nasty on the borescope. Your bottom hole in the backer made me think of it since it appears to also have the lead dusting.

 

[Rob01]

That entire 5-shot group was aimed at the red dot in the center of circle #4. The range has a clear path with no obstructions between the shooting bench and the targets.

I was asking as I was wondering if that hole is from a round that went through the target and ricocheted off the backstop and went back through the target from the back. Just never saw a bent round hit a target before. Sideways yes but bent in half no.

 

[Bbracken667]

• I will recheck the Magnetospeed the next time I have the rifle set up at the range. After the boomerang round I pulled the bolt and looked down the barrel. I didn't see any signs of the Magnetospeed's bayonet, but then again, I didn't shine a light down the barrel or perform any other clearance dimension type testing.
• I did check and made sure the thread-protector cap was on tight.
• Yes the red outline photo is the backer. I included that photo because you can see lead marks on all the impacts, including the two boomerang shaped holes. Or are the black rings around bullet holes just powder marks?
• I've got around 1100 rounds through the rifle. Last cleaned about 100 rounds ago.

How common is it for Hornady 140 ELD-Match bullets to break apart in flight? I searched online earlier this week but did not find anything meaningful.

Never happened to me, although I do remember something about that happening (not sure Hornady though) with high spin rates and fast MV’s

 

[TCreedmoor]

I was asking as I was wondering if that hole is from a round that went through the target and ricocheted off the backstop and went back through the target from the back. Just never saw a bent round hit a target before. Sideways yes but bent in half no.

There is an earthen berm several feet behind the target frame. No steel or other flat surface to cause a ricochet. Whatever made the boomerang shaped holes definitely went through the target from the front. The torn corrugated material was bent/folded backwards.

 

[Rob01]

No rocks in that earthen berm? If not, no clue then. Very odd as bullets don't bend mid flight. If it came apart as people talk about then you will see a poof and it disintegrates. Doesn't bend in half.

 

[Pappasniper]

Anyone running IMR 4350 for 6.5CM? And what is your load data if so? I know most people like H4350 but I have some IMR available as well.

PB

 

[Bbracken667]

Anyone running IMR 4350 for 6.5CM? And what is your load data if so? I know most people like H4350 but I have some IMR available as well.

PB

IMR 4350 41.9 gr
24.3 inch barrel tikka t3
2.870 col
2.250 cbto
140 gr eldm
BR2 cci primer
Lapua srp brass

That the info on my phone. Unsure as to MV without accessing my laptop. Been using Vihta Vouri powder of recent. I am a long time user of IMR going back to mid 70’s? 30-06 for decades.

 

[Old Corps 8541]

Anyone running IMR 4350 for 6.5CM? And what is your load data if so? I know most people like H4350 but I have some IMR available as well.

PB

You didn't state what bullet weight ? or what rifle?
With a 140 gn bullet I'd start at 39.0 gn of I and work up . Sierra lists 36.3 to 42.3 with their 140 & 142 SMK

 

[Simonsza1]

I used imr4350 for 6.5 creed a lot back in the early days with the 140bthp match Hornady bullet cause i had a bunch. It works great and imo very similar to H. Some say it’s temp sensitive compared to H4350 but I never experienced that. I do remember it a touch hotter so my loads were a bit less powder then they are now with H4350 for the same result. If that’s what you have then you will be more then fine using it,, great powder! Start low work up.

 

[TCreedmoor]

Anyone running IMR 4350 for 6.5CM? And what is your load data if so? I know most people like H4350 but I have some IMR available as well.

PB

When I first started reloading I was trying IMR 4350, H4350 and StaBall 6.5. I'm on my last pound of H4350 right now, so I'm going to be moving back to IMR 4350 for a while. It always shot extremely well for me. My profile picture is a 5-shot group using 41.1 grains of IMR 4350 and BR-2 primers. With a 24" barrel I was getting around 2740 ft/sec using Hornady 140 ELD-Match bullets.

 

[BuildingConceptsllc]

When I first started reloading I was trying IMR 4350, H4350 and StaBall 6.5. I'm on my last pound of H4350 right now, so I'm going to be moving back to IMR 4350 for a while. It always shot extremely well for me. My profile picture is a 5-shot group using 41.1 grains of IMR 4350 and BR-2 primers. With a 24" barrel I was getting around 2740 ft/sec using Hornady 140 ELD-Match bullets.

What about temp stability with the IMR??? Particularly in really hot weather, like 100 degree weather for example.

 

[Bbracken667]

What about temp stability with the IMR??? Particularly in really hot weather, like 100 degree weather for example.

IMR 4350 is one of the more stable IMR powders. Top 15-20% of all the powders on the list I have.
Best solution is to not load up a lot. If you work up your load in the 70’s adjusting for 30° difference is no sweat. You are only adjusting for a relatively small speed difference. Stay away from max and don’t sweat it. It will be more accurate at lower charges anyway.

 

[Pappasniper]

Thanks guys. Using IMR 40.8g, Fed primers, Hornady brass and getting 2711 FPS out of my Bergara LRP with Dead Air 30 on the tip. Like you said, every lot of powder has its own deal. I have not seen an issue with temp issues and living in AZ. But we are now doing a lot more chrono so maybe this summer we will detect an issue.

PB

 

[Pappasniper]

IMR 4350 is one of the more stable IMR powders. Top 15-20% of all the powders on the list I have.
Best solution is to not load up a lot. If you work up your load in the 70’s adjusting for 30° difference is no sweat. You are only adjusting for a relatively small speed difference. Stay away from max and don’t sweat it. It will be more accurate at lower charges anyway.

Yes agreed, and getting away from max FPS and I run these same loads in my LMT MWS so I dont want them super hot and popping primers.

PB

 

[BuildingConceptsllc]

IMR 4350 is one of the more stable IMR powders. Top 15-20% of all the powders on the list I have.
Best solution is to not load up a lot. If you work up your load in the 70’s adjusting for 30° difference is no sweat. You are only adjusting for a relatively small speed difference. Stay away from max and don’t sweat it. It will be more accurate at lower charges anyway.

Yeah I was just trying to compare it to H4350 where I don't really have to do that.

 

[Bbracken667]

Yeah I was just trying to compare it to H4350 where I don't really have to do that.

It is, surprisingly, fairly close, unlike other powders temp-sensitivity-wise. I went to VV 540 and 555 for overall reasons, one of which was temp sensitivity but that was not, in itself, sufficient to make me change. IMR 4350 is a fine powder and not a potential problem such as cfe223 which I have also used. CFE223 is the most sensitive of all powders (last I checked) and it was still manageable. Just don’t ignore the stats and use some common sense and you should be a-ok.
Also, don’t be that guy that believes charges need to be above max because that last mv is important. It’s not. More pressure results in more instability.
You never hear of pros overcharging their rounds to get that last extra mv. At least I haven’t. Wouldn’t matter to me, my quality of life and my hardware are more important than that.

 

[Bbracken667]

Yeah I was just trying to compare it to H4350 where I don't really have to do that.

Oh, and what temp do you do your load developments at? That is as important as sensitivity. If you are working up at 85-90 then 10-15 degrees won’t mean much unless you are walking the maximum edge.

 

[BuildingConceptsllc]

Oh, and what temp do you do your load developments at? That is as important as sensitivity. If you are working up at 85-90 then 10-15 degrees won’t mean much unless you are walking the maximum edge.

I try to do my load development in the mid range Temps, which for us here is about 75 degrees ish. Then I'm in pretty good shape if it gets colder or warmer with the same load. If I know I'm going to be in really cold weather then I will just load for that but I like being able to stack up ammo for my main calibers and have it there for when I get a chance to go shoot but depends on what I'm going to be doing too of course

 

[ncyotecaller]

#,SPEED (FPS),Δ AVG (FPS),KE (FT-LB),POWER FACTOR (KGR⋅FT/S),TIME,CLEAN BORE,COLD BORE,SHOT NOTES
1, 2704.0, 9.6, 2532.1, 421.8, 10:36:27 AM, , , ""
2, 2703.6, 9.3, 2531.5, 421.8, 10:37:20 AM, , , ""
3, 2689.9, -4.4, 2506.0, 419.6, 10:38:07 AM, , , ""
4, 2695.3, 0.9, 2515.9, 420.5, 10:39:00 AM, , , ""
5, 2695.2, 0.8, 2515.7, 420.4, 10:40:13 AM, , , ""
6, 2687.8, -6.5, 2502.0, 419.3, 10:42:08 AM, , , ""
7, 2694.5, 0.2, 2514.5, 420.3, 10:44:24 AM, , , ""
8, 2696.3, 1.9, 2517.8, 420.6, 10:47:38 AM, , , ""
9, 2692.1, -2.2, 2510.0, 420.0, 10:49:17 AM, , , ""
10, 2694.4, 0.1, 2514.3, 420.3, 10:50:38 AM, , , ""
11, 2696.8, 2.5, 2518.8, 420.7, 10:51:35 AM, , , ""
12, 2691.2, -3.1, 2508.3, 419.8, 10:53:05 AM, , , ""
13, 2689.4, -5.0, 2504.9, 419.5, 10:54:16 AM, , , ""
14, 2695.8, 1.4, 2516.8, 420.5, 10:55:27 AM, , , ""
15, 2694.3, -0.0, 2514.1, 420.3, 10:57:32 AM, , , ""
16, 2690.8, -3.5, 2507.6, 419.8, 10:58:18 AM, , , ""
17, 2690.6, -3.8, 2507.1, 419.7, 10:59:03 AM, , , ""
18, 2700.0, 5.7, 2524.7, 421.2, 10:59:51 AM, , , ""
19, 2694.0, -0.4, 2513.5, 420.3, 11:01:18 AM, , , ""
20, 2690.8, -3.6, 2507.5, 419.8, 11:01:49 AM, , , ""
-,,,,,,
AVERAGE,2694.3,,,,,,,
STD DEV,4.3,,,,,,,
SPREAD,16.2,,,,,,,
Session Note,"",,,,,,,
-,,,,,,
All shots included in the calculations,,,,,,,,

1st trip out with the Garmin

 

[wilson3899]

#,SPEED (FPS),Δ AVG (FPS),KE (FT-LB),POWER FACTOR (KGR⋅FT/S),TIME,CLEAN BORE,COLD BORE,SHOT NOTES
1, 2704.0, 9.6, 2532.1, 421.8, 10:36:27 AM, , , ""
2, 2703.6, 9.3, 2531.5, 421.8, 10:37:20 AM, , , ""
3, 2689.9, -4.4, 2506.0, 419.6, 10:38:07 AM, , , ""
4, 2695.3, 0.9, 2515.9, 420.5, 10:39:00 AM, , , ""
5, 2695.2, 0.8, 2515.7, 420.4, 10:40:13 AM, , , ""
6, 2687.8, -6.5, 2502.0, 419.3, 10:42:08 AM, , , ""
7, 2694.5, 0.2, 2514.5, 420.3, 10:44:24 AM, , , ""
8, 2696.3, 1.9, 2517.8, 420.6, 10:47:38 AM, , , ""
9, 2692.1, -2.2, 2510.0, 420.0, 10:49:17 AM, , , ""
10, 2694.4, 0.1, 2514.3, 420.3, 10:50:38 AM, , , ""
11, 2696.8, 2.5, 2518.8, 420.7, 10:51:35 AM, , , ""
12, 2691.2, -3.1, 2508.3, 419.8, 10:53:05 AM, , , ""
13, 2689.4, -5.0, 2504.9, 419.5, 10:54:16 AM, , , ""
14, 2695.8, 1.4, 2516.8, 420.5, 10:55:27 AM, , , ""
15, 2694.3, -0.0, 2514.1, 420.3, 10:57:32 AM, , , ""
16, 2690.8, -3.5, 2507.6, 419.8, 10:58:18 AM, , , ""
17, 2690.6, -3.8, 2507.1, 419.7, 10:59:03 AM, , , ""
18, 2700.0, 5.7, 2524.7, 421.2, 10:59:51 AM, , , ""
19, 2694.0, -0.4, 2513.5, 420.3, 11:01:18 AM, , , ""
20, 2690.8, -3.6, 2507.5, 419.8, 11:01:49 AM, , , ""
-,,,,,,
AVERAGE,2694.3,,,,,,,
STD DEV,4.3,,,,,,,
SPREAD,16.2,,,,,,,
Session Note,"",,,,,,,
-,,,,,,
All shots included in the calculations,,,,,,,,

1st trip out with the Garmin

These Garmin's are legit.
What's the load details? Assuming it's either the 153.5 or 156?