6.5 creedmoor AR Only

Here I thought I was running mine short at 2.770 -2.780 ,probably just MY weapon as I ran a few out too 2.820 and had feed issues ,so knocked em back a smidge and problem solved .

As COL cartridge is 2.825 or 71.8 mm
 
Anybody reloading with Hodgdon SuperFormance and 140gr BTHP in their AR10 / 6.5 CM? Looking for some reloading results. I have my ladder reloaded but want to see how far anybody went or if anyone had better results with a particular load.
 
OK I got some numbers. I don't have H4350 for that barrel as I ran out and switched to StaBALL 6.5 on the Proof. I have a lot of data on H4350 in my 22" Ultramatch.

Anyway, I was messing with 41g - 41.5g of StaBALL 6.5. I worked up from 39.6g in 0.3g increments 5 shot groups till I found something right around 41.2. I then started tightening up the increments. This was all with 147 ELD-M's.
Did you do any testing with the 153
 
Hope everyone had a safe and sane 4 Th. . Around here it was pandemonium grand spectacular as never before .
Because of our location elevation ,we're able to observe #60-70 individual fireworks display from cities townships as well as numerous individual displays . This year a professionally produced #18,505 pyrotechnic auspicious display took center stage ,accompanied by surrounding displays . Reminiscent of a 1965 Timothy Leary psychedelic Aurora Borealis show . Colorful to say the least .

AM Range evaluation 6.5 CM 123 129 , going to stick with VV 560 & 540 as they're proving most accurate out of MY AR .
I'm also very impressed with Hornady's Whitetail 129 grain interlock offering ,it appears nearly as accurate as MY own 129 LR hunting load . Thankful for computers ,so as to cleanly transfer sloppy handwritten data (y)
 

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do you guys crimp your cases? I feel like my bullets get jammed being chambered.
if i have to i will . i have yet to try a bullet thats is more that 120gr , could not get them to move .maybe 140's will?? .really did not get the gun to be shooting 140's would rather like to keep it no more than 120's.
 
Always figured tapered crimp was for bullets without cannelure and cannelures were for friction or rolling brass into for a roll crimp .
However may not be the purpose after all . : Identification :eek:

https://projects.nfstc.org/firearms/module10/fir_m10_t06_09_d.htm

Knurled grooves
Courtesy of Ronnie Freels
Smooth groove
Courtesy of Ronnie Freels



Cannelures may or may not serve a functional purpose on a given bullet. They are very useful in determining the manufacturer and, in some cases, the stock number of bullets that are used only for specific purposes.


Number​


It is useful to document the number of cannelures found on each type of bullet; this further limits the number of candidates when searching for similar examples in reference resources (primarily in a laboratory Standard Ammunition File [SAF]).


Location​

fir_m10_t06_09_d.3.jpg

Cannelure distance

Courtesy of Ronnie Freels


The location of each cannelure in terms of its height above the base of a bullet is another physical feature or set of physical features used as an additional filter to limit the field in searching reference files.
 
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Gonna try and Shoot tomorrow . Wife & I just got back from 28 day Alaska vacation . Now for the most part WONDERFUL .
Cruise ship up NEVER EVER AGAIN !. Had to Jump ship check into Hospital and insist on IV's of Remdesivir ,followed by #5 days of Paxlovid . We were both healthy without any illness ( Me 44 Years without a sniffle ,not a cold flu Nothing ) ,ship was too Big too many Ornamental's from Country of origin . The 4 Th. day felt like Death . After 8 days of IV's oral drugs felt Much much better ,so we resumed our planned excursions . Including MY 6 day 7 night Fishing trip . Holy Chit have prices gone UP !!.

Will be around now we're back , carry on . (y)
 
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Gonna try and Shoot tomorrow . Wife & I just got back from 28 day Alaska vacation . Now for the most part WONDERFUL .
Cruise ship up NEVER EVER AGAIN !. Had to Jump ship check into Hospital and insist on IV's of Remdesivir ,followed by #5 days of Paxlovid . We were both healthy without any illness ( Me 44 Years without a sniffle ,not a cold flu Nothing ) ,ship was too Big too many Ornamental's from Country of origin . The 4 Th. day felt like Death . After 8 days of IV's oral drugs felt Much much better ,so we resumed our planned excursions . Including MY 6 day 7 night Fishing trip . Holy Chit have prices gone UP !!.

Will be around now we're back , carry on . (y)
Glad to hear you are both feeling better. Never been on a cruise and never will be.
 
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Glad to hear you are both feeling better. Never been on a cruise and never will be.

Thank You ; I'm much much better as is the Wife . Resumed Property chores yesterday and today ,so Labor day will definitely be shooting .
Now for the most part cruises are OK even reasonable in some cases . Not being much of a gambler or drinker ,severely limits My personal activities aboard ship . I'd personally be happier than a pig in chat ,if they'd allow Me access to the Engine room and on board Desalination plants in other words the Heart of the beast . Sadly they DON'T allow that access anymore . So fond memories of the Mighty Servant 2 of the Dockwise fleet will have to suffice . I was privileged to have been allowed aboard her during an operation ,as I knew the Captain .
Theaters are Death Warrants a bunch of hollyweird crap plus rug misters ISN'T My thing
However as I said NO MORE cruise ships for us . I'm Glad we did 98% of them during the 2K - 2016 era as things Worldwide were calmer and prices more reasonable and NO fricken illnesses .

We limited ourselves to #5 days on the Eurodam ,as we had planned several land excursions ,so wherever Trains Buses and some Bush planes could manage to take and pick us up was the Idea . The vacation was Worth every dime it cost us . However from now on Flying and or driving is the plan .
 
Cruises suck massive cock unless your primary interests are stuffing your face, drinking non stop, or gambling in a tiny casino. The one (and only one) I went on the ship travelled from destination to destination overnight.You got off the ship in the morning and were told be back by 4pm or you are fucked. This gives you just enough time to run into town to buy some crap or take "an excursion" meaning get on a bus to tour the area or spend the day in the "duty free" jewelry and booze shops at the port.. You don't have time to check an area out. Way better of pick a place, fly there, stay several days, enjoy.
 
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Cruises suck massive cock unless your primary interests are stuffing your face, drinking non stop, or gambling in a tiny casino. The one (and only one) I went on the ship travelled from destination to destination overnight.You got off the ship in the morning and were told be back by 4pm or you are fucked. This gives you just enough time to run into town to buy some crap or take "an excursion" meaning get on a bus to tour the area or spend the day in the "duty free" jewelry and booze shops at the port.. You don't have time to check an area out. Way better of pick a place, fly there, stay several days, enjoy.
I agree wholeheartedly with exception to certain ports which are prohibitive too fly into because of cost . Greece ,Mediterranean, Italy being a few . Some hotels are akin to armed robbery . Yet generally I agree fly stay enjoy what interests you and then Leave .

Down under I did an extensive stint ,as I also worked there for a period of time . Even bought property on the Gold Coast with anticipation of someday moving there . Until the left winged morons changed the gun laws ,sold the property off made a couple of bucks and only went back to see some friends .
 
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gave up on the 95 gr .now trying the 100 gr hornady, not wanting another deer rifle its a heavy varmint
 

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I like the 123-129-140-143 Gr. they have all provided excellent grouping for ME . Figuring out powder charges has been the biggest obstacle but have definitely settled on VV 560 & 540 . Norma's Golden Target 143 gr. proved to be excellent factory fodder in MY AR 6.5 CM
 

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SAAMI says 62k psi and CIP is 63k psi.

AR10 has nothing to do with it
I found this info but assumed it was for a bolt gun. Are you saying that we can run 6.5CM up to 62k without issue? I think I'm just a tick over 60k with 40.9g of H4350 under a 147ELDM. Getting 2718fps with a SD of 8.7 and an ES of 27, jumping 130 thou. Getting some swipes on the case head, (Hornady brass), and some slight cratering of the CCI 200 primers. Still fine tuning my load, I'd like to keep it in the low 2700's and that's were I'm at on a 95* 4000' DA day.

Aero E5 upper and lower.
Aero Breach gas deflecting charging handle
San Tan Tactical BCG
Radian Talon ambi safety
Odin 22" +2 gas and their AGB
APA Gen 3 Little Bastard brake, (to be replaced with a Thermal Suppressors Glacier when it gets out of jail)
ERGO vertical grip
Timney single stage trigger
Magpul PRS stock
Chicom MLOK Arca rail
Atlas Arca bipod
Leupold Mark 5 HD with PRS-2 mil reticle
Leupold one piece cantilever mount

0728241503a.jpg
 
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I found this info but assumed it was for a bolt gun. Are you saying that we can run 6.5CM up to 62k without issue? I think I'm just a tick over 60k with 40.9g of H4350 under a 147ELDM. Getting 2718fps with a SD of 8.7 and an ES of 27, jumping 130 thou. Getting some swipes on the case head, (Hornady brass), and some slight cratering of the CCI 200 primers. Still fine tuning my load, I'd like to keep it in the low 2700's and that's were I'm at on a 95* 4000' DA day.

Aero E5 upper and lower.
Aero Breach gas deflecting charging handle
San Tan Tactical BCG
Radian Talon ambi safety
Odin 22" +2 gas and their AGB
APA Gen 3 Little Bastard brake, (to be replaced with a Thermal Suppressors Glacier when it gets out of jail)
ERGO vertical grip
Timney single stage trigger
Magpul PRS stock
Chicom MLOK Arca rail
Atlas Arca bipod
Leupold Mark 5 HD with PRS-2 mil reticle
Leupold one piece cantilever mount

View attachment 8500893

AR chambers are in the Barrel steel and that's somewhere between 175K-205K Psi in 416 SS . Bolt guns could be higher due to chambers being in milled receiver generally speaking .

AR barrels lock via a pin and an external barrel nut which attaches to the 7075 Aluminum Upper Receiver .

https://2centtac.com/ar15-parts-diagram-with-bits-and-pieces/
 
Does anyone have a good explanation on how to find the shoulder bump properly on a gas gun bolt? I take the ejector and the firing pin out of my bolt actions to find shoulder bump, I’m just not sure the proper way to do the same with a gas gun. Thx 🙏
 
Does anyone have a good explanation on how to find the shoulder bump properly on a gas gun bolt? I take the ejector and the firing pin out of my bolt actions to find shoulder bump, I’m just not sure the proper way to do the same with a gas gun. Thx 🙏
On a new build I just fire a few factory loads. De-prime the fired cases, light file the head to remove any ejector burr, & measure the shoulder datum with a comparator. FL size to set shoulders back .002" from the fired cases.

Only time I take the ejector out is to head space a new barrel.
 
On a new build I just fire a few factory loads. De-prime the fired cases, light file the head to remove any ejector burr, & measure the shoulder datum with a comparator. FL size to set shoulders back .002" from the fired cases.

Only time I take the ejector out is to head space a new barrel.
Essentially that is what I have done in the past, I am starting with virgin peterson brass and have plenty of fired brass, just not out of this gun. I am curious if there was a way to “feel” a case shoulder bump in a gas gun?

I have resolved the issue via measuring a factory loaded round that i pulled the projo from. With my comparator I’ll resize used brass as test loads for my initial zero as I just put together an economic build.
IMG_3783.jpeg
 
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Essentially that is what I have done in the past, I am starting with virgin peterson brass and have plenty of fired brass, just not out of this gun. I am curious if there was a way to “feel” a case shoulder bump in a gas gun?

I have resolved the issue via measuring a factory loaded round that i pulled the projo from. With my comparator I’ll resize used brass as test loads for my initial zero as I just put together an economic build. View attachment 8503443

Not sure exactly what's meant by feeling the shoulder case bump ?. Shit I don't think I'd know the difference of 0.0020" from 0.0001" without measuring it. When the charging handle flies forward it either slams it home or there's an errant reloader problem ,which needs attention . Even breaking open the upper and hand feeding a case into the chamber ,I couldn't tell


I've spoiled myself and have very accurate case gauges ,along with the comparator tool and all the empty modified cartridge cases from MY chambers . So I measure and verify against known spent cases . May seem like a pain but when I hit either My range or another ,my ammo runs without hiccups . Like Shoots 700 said , 0.004" bump on Gas guns is a GOOD practice . Bolts or BR guns yeah 0.001" is OK but NOT reliable in Gas or Hunting rifles . MY motto Min. 0.002" in Bolt and hunting rifles I ensure EVERY hand load chambers without incident . While wondering around in Acacia and Cat's Claws ,I want MY ammo slipping in effortlessly , especially when that Cape Buffalo pokes it's horns out .
:)
 
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Has anyone been loading 95gr vmax’s or 100gr VT’s in their gas guns? Any info would be greatly appreciated, especially with a starting load.

I currently run the 100’s in my bolt gun with 42gr of Varget.

Oh, and are CCI 450’s GTG in a 6.5cm gas gun?
 
@Ex E6 I appreciate your input on the shoulder bump. I’ll adhere to four thou shoulder bump and seat them projos according to group size limiting to 2.77-2.80”
It's a GOOD practice ,as is 0.020" bullet jump , especially in Gas Guns . BR Guns sure 0.005 or less is acceptable . Bad things can happen in a Jump and shake AR scenario ,so NOT so good an idea .

Peak accuracy comes in the form of Proper Case prep , Careful powder measuring and using correct components . Also making sure your ammo centers in Your bore . Lowest ES & SD with nearly highest velocity but consistent velocity is really the KEY . Burning a barrel lede diminishes accuracy ,so lower velocity 99% of the time ISN'T gonna really hurt much . The only time it's really necessary is Extreme range . IMO . Bottom line one doesn't need to put Falcon wings on 100 yd. targets , those come out at 1K yd. or more .
 
It's a GOOD practice ,as is 0.020" bullet jump , especially in Gas Guns . BR Guns sure 0.005 or less is acceptable . Bad things can happen in a Jump and shake AR scenario ,so NOT so good an idea .

Peak accuracy comes in the form of Proper Case prep , Careful powder measuring and using correct components . Also making sure your ammo centers in Your bore . Lowest ES & SD with nearly highest velocity but consistent velocity is really the KEY . Burning a barrel lede diminishes accuracy ,so lower velocity 99% of the time ISN'T gonna really hurt much . The only time it's really necessary is Extreme range . IMO . Bottom line one doesn't need to put Falcon wings on 100 yd. targets , those come out at 1K yd. or more .
Words wisely put, Understanding is key, follow through is Crucial.

My 6 Smasher (dasher) was my ticket to understanding the one stop shop. I maintain order, follow process the same, and maintain a consistent order in my stage to stage process. My used cases go from case prep, the ingredients in the ss tumbler too the time it spins, a proven science. I’ll go fourth and run an entire batch 300-500x the same. My press process is unfuckwithable (drop powder, seat projo, perhaps inspect every 5-10,20) I have other processes like neck mandrel etc..I appreciate your advice and will try and find my lands on this budget build 65ar… my original question reiterated is “ How did you find your .020” jump? “💪🏴
 

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Words wisely put, Understanding is key, follow through is Crucial.

My 6 Smasher (dasher) was my ticket to understanding the one stop shop. I maintain order, follow process the same, and maintain a consistent order in my stage to stage process. My used cases go from case prep, the ingredients in the ss tumbler too the time it spins, a proven science. I’ll go fourth and run an entire batch 300-500x the same. My press process is unfuckwithable (drop powder, seat projo, perhaps inspect every 5-10,20) I have other processes like neck mandrel etc..I appreciate your advice and will try and find my lands on this budget build 65ar… my original question reiterated is “ How did you find your .020” jump? “💪🏴
I use two methods ,first two spent cases from MY chamber measuring all aspects . Then using a Comparator gauge with a typical style bullet I'd use . Carefully insert into chamber lock comparator down and withdraw it then Measure it with calipers.
Second method is a modified spent case from My chamber ,which is inserted with same bullet out long and close the bolt until it's fully into the lands . I then have a super straight brass rod I insert down the bore and measure it ,against the chamber measure .
By doing this I'm generally within 0.001-2 " of each measurement being equal . I then set bullet Seater 0.20" less than either of the two measurements . Good too Go .

Seems to ME ,You've got it all under control and stay focused . BOL
 
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I use two methods ,first two spent cases from MY chamber measuring all aspects . Then using a Comparator gauge with a typical style bullet I'd use . Carefully insert into chamber lock comparator down and withdraw it then Measure it with calipers.
Second method is a modified spent case from My chamber ,which is inserted with same bullet out long and close the bolt until it's fully into the lands . I then have a super straight brass rod I insert down the bore and measure it ,against the chamber measure .
By doing this I'm generally within 0.001-2 " of each measurement being equal . I then set bullet Seater 0.20" less than either of the two measurements . Good too Go .

Seems to ME ,You've got it all under control and stay focused . BOL
I had to put a little work in for this one… I stayed focused lol. Using a fired case I drilled and tapped (lathe) the primer pocket for my o.a.l. tool gauge, modified the case neck to allow manageable neck tension. I have never really had accurate numbers with that tool in my bolt guns in the past but it def exceeded my expectations on this job. Thanks for your time and attention to this matter, bamf like you keep me inspired 🏴
 

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I had to put a little work in for this one… I stayed focused lol. Using a fired case I drilled and tapped (lathe) the primer pocket for my o.a.l. tool gauge, modified the case neck to allow manageable neck tension. I have never really had accurate numbers with that tool in my bolt guns in the past but it def exceeded my expectations on this job. Thanks for your time and attention to this matter, bamf like you keep me inspired 🏴

I used to slit the neck of the case but found inaccurate readings do too slippage of tension . So MY cases are neck turned so as to make sure cartridge is centered in the chamber . I'm not 100% certain it's necessary but did two cases for each of My chambers in various calibers . I correctly bump shoulders 0.002" for Measurement purposes only and squeeze turned necks 0.002" also for bullet tension .

Seems to work for ME ,as bullet tends to stay inside the case and not stuck in the lands. I also use a swab of LU708 Sprayon PTFE dry film lube inside MY chamber and throat Lede .

Not unlike yourself ,I also chucked up cases in My Lathe turned necks and drilled primer pockets with a 7.30mm bit ,so as to get a properly tapped straight hole ,for that 5/16"x 36 ,which is an odd duck .

I seem to be getting consistent measurements ,so must have done something correctly :)
 
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I used to slit the neck of the case but found inaccurate readings do too slippage of tension . So MY cases are neck turned so as to make sure cartridge is centered in the chamber . I'm not 100% certain it's necessary but did two cases for each of My chambers in various calibers . I correctly bump shoulders 0.002" for Measurement purposes only and squeeze turned necks 0.002" also for bullet tension .

Seems to work for ME ,as bullet tends to stay inside the case and not stuck in the lands. I also use a swab of LU708 Sprayon PTFE dry film lube inside MY chamber and throat Lede .

Not unlike yourself ,I also chucked up cases in My Lathe turned necks and drilled primer pockets with a 7.30mm bit ,so as to get a properly tapped straight hole ,for that 5/16"x 36 ,which is an odd duck .

I seem to be getting consistent measurements ,so must have done something correctly :)
Yes, In the past I had found the spent case from the chamber (when drilled/tapped for my gauge) had a neck tension that was to loose to properly hold the projo without it slipping, getting stuck, inaccuracy. I had an extra 65cm case made up from a previous rifle, a decade ago when the cm debuted… found that sucker and modified it sense I’ve no experience with the factory hornady production caliber cases for their oal gauge. This modified case was FL sized and after the slit was cut, de burred,I ran a neck mandrel of .003” nt, verified concentricity.. surprisingly the projo never once got stuck in the bbl! I had repeatable readings everytime, and this case now works awesome for setting up my seating die when changing projos!

To my surprise, the barnes match burners with the biggest jump, grouped the best out of the 140 match, 140 SST (good groups, sub min) & the 145 match burners. tested with lapua and peterson brass. Thanks ExE6 for your reply!
 

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