22 creedmoor
- Thread starter Subhunter2
- Start date
Heavy Sporter Criterion Prefit 24" 1 in 7" Twist, Savage 110 Action, MDT LSS Chassis
It was a 5 shot group, forgot to hit "ok" on the Xero for the 1st shot.
85F, 4000fasl, 33% humidity
None of the BLC-2 loads had a Std Dev lower than 15. H4350 gives lower SDs.
I am wanting to load 65 gr game kings as well, and have lots of IMR 4166 on hand. Does anyone have any load data for IMR 4166? Typically similar charge weights for Varget and IMR 4166 but want to be sure. Alpha LRP brass.Lapua virgin
Sierra 65 game king
39 gr. Varget
Cci br4
3576 fps
Green mountain 20” 1-9 twist button rifled barrel
25 rounds down it. Should speed up
Collecting parts for a new build I plan to shoot suppressed 100% of the time.
Impact 737
Foundation Gideon
Some barrel questions…
1. Shooting 80-90s, what’s the verdict on twist? 7? 8? Somewhere in between?
2. Min barrel length? I’m thinking 22 with a TB Ultra 7 attached all the time. Anyone going 20 or shorter?
Impact 737
Foundation Gideon
Some barrel questions…
1. Shooting 80-90s, what’s the verdict on twist? 7? 8? Somewhere in between?
2. Min barrel length? I’m thinking 22 with a TB Ultra 7 attached all the time. Anyone going 20 or shorter?
I’m running a 26” barrel in 1:7 RH Twist… I had a custom reamer made by JGS for my first rebarrel. I figured it would be best to get ahead of things for when the time is right. The reamer arrived and I got the itch to have a barrel cut to have ready to go.
FYI.. current barrel has just over 600rds through it. It’s a REM Heavy Varmint Barrel 26” 7 Twist. The replacement barrel is 26” M24 7 Twist.
As far as bullets go, I used to shoot Berger 85.5gr LRHTs and then switched to 88gr ELD-Ms. They both shoot light out.
FYI.. current barrel has just over 600rds through it. It’s a REM Heavy Varmint Barrel 26” 7 Twist. The replacement barrel is 26” M24 7 Twist.
As far as bullets go, I used to shoot Berger 85.5gr LRHTs and then switched to 88gr ELD-Ms. They both shoot light out.
Throat erosion.. I tied them when the barrel was new and I couldn’t get them to shoot good. I tried the Bergers then and it loved them. Fast forward 600rds and a little over .125” of throat erosion, I couldn’t chase the lands anymore and lost some accuracy so I revisited the 88s and they have a lot more bearing surface. I seat them .005 off the lands and get 3200fps with .25 moa or better. Now, the 88s perform the same or better than the 85.5s, performance numbers, BC etc. are the same or better and the price is less than half… that’s very hard to ignore for sure! So I switched to those and am shooting more for less with the same or better accuracy numbers.
Keep in mind though, every barrel is different and one may not like what another does. In this case, it didn’t like one over the other early in its life and later it flipped… I’m fine with that being that I can shoot twice as much for the same money.
What kind of barrel life are you seeing with the 22cm? Any worse than a 22-250?
I haven’t burned through my first yet but made another barrel just in case. I don’t know the barrel life yet but have been documenting for when it’s done. From everything I hear, they’re around 1200-1800 depending on how you treat them of course. I don’t worry about it though, it’s like a sports car, you don’t look at the price of gas or the mileage, you just drive and enjoy the experience.
I'm running an 18" 7.5tw 219 bore ace lt palma, always suppressed. More of a utilitarian hunting/target build at 10-11# all up. Shooting 88s and 90s, running 3100fps with H4350 or N555. I've had 3 22cm barrels now, 22in 8tw was the first, 2nd was 18in 7tw, this ones 18in 7.5tw.
I'm at 950' shooting 95 SMK's out of a 26" MTU PVA OBW 1:7 .219 bore. Shoots great @ 560 throughput.
Had some black friday deals so I went with a 1/7.5tw benchmark button rifled 6 grooves med palma for my 18in jack of all trade rifle on a ARC CDG with a xylo chassis for the 75-88gr weight range and I also got a carbon wrapped 1/7 18in for my defiance anti ultra lightweight hnt26 for the 77 lrx for dedicated varmint and white tail gun.
Going to use N555 exclusively with Alpha SRP brass.
Probably won't do much of load dev since the barrel life is short on these, I'll target for 3200 for the LRX, 80.5 and 3100 for the 88s which should be able 39-41gr of N550 at 2.65 according to VV, Hornady and QL
Going to use N555 exclusively with Alpha SRP brass.
Probably won't do much of load dev since the barrel life is short on these, I'll target for 3200 for the LRX, 80.5 and 3100 for the 88s which should be able 39-41gr of N550 at 2.65 according to VV, Hornady and QL
I shoot N555 in alpha srp brass, 18in 7.5tw 4gr 237 bore ace barrel. You're desired speed will likely require more powder. My barrel was cut with alpha 169fb chamber. I'm jumping 88s bout 50k at 2.71 oal, and with a drop tube, 43.5gr was all I could fit, 3150mv. Shoots well there but a bit toasty, dropped to 42.1gr and running 3040mv, all weather safe load. Just my experience with your exact desired load combo. Good luck!
Hornady match 6 creed bushing die with a .250 TiN bushing and an undersized button on the de-capper Then it gets ran over a mandrel.
I recently screwed on a varmint contour 24" Shilen 7.5 twist ratchet rifled barrel. I will report back on how it works with the Hornady bullets... I am planning to primarily shoot the 80 ELDx which I am hoping will also avoid blow up issues due to its thicker jacket. The initial loads will be with H4350 and Alpha brass.
Figured I would report back on initial loads. All loads shot out of a 24" Shilen Select Match with 1/7.5 twist on a Rem 700 action.
Used the 80 ELD-X and 64 Nosler Bonded. All were Alpha LRP brass with CCI-200's.
Both H1000 and N565 are a little on the slow side with 80's. Topped out around 3150 with 45 gr of each (they were equivalent), and this was a compressed load. No concern for pressure.
With H4350 and the 80's, I topped out at 38 gr and 3050 fps. I think H4350 is a bit too fast for maximum velocity.
The Nosler 64's got up to 3550 with 42.5 gr of H4350. Didn't try any slower powders.
Plan for next session is to try some N555, N560, and Superformance.
Used the 80 ELD-X and 64 Nosler Bonded. All were Alpha LRP brass with CCI-200's.
Both H1000 and N565 are a little on the slow side with 80's. Topped out around 3150 with 45 gr of each (they were equivalent), and this was a compressed load. No concern for pressure.
With H4350 and the 80's, I topped out at 38 gr and 3050 fps. I think H4350 is a bit too fast for maximum velocity.
The Nosler 64's got up to 3550 with 42.5 gr of H4350. Didn't try any slower powders.
Plan for next session is to try some N555, N560, and Superformance.
I'm hoping to hit the range this week. 42.0gr N550, 77 LRX-BT, 2.622in coal. 18in barrel
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Just did a quick velocity test on the farm.
This load gets me 3200FPS with a very slight swipe.
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Some N555 numbers.
Very impressed with the velocity spread.
18in CW barrel, 0.090 FB Manson reamer
Alpha SRP brass
Brand new barrel.
Berger 80.5
2.665in coal
42.3gr N555
3175 FPS. SD 5 ES 13.
Very tight. All 5 groups were easy 1/2-3/4 moa. I’ve never had to do any load dev with these bullet, same results in my 223 rem.
Barnes LRX 77
2.620in coal
41.7gr N555
3180 FPS SD6 ES 15
Dogshit accuracy. I think these need more jump. I’ll try again at 2.58in and if I can’t find anything decent I’ll dump them for Speer 75 GD or the 77 TMK
Very impressed with the velocity spread.
18in CW barrel, 0.090 FB Manson reamer
Alpha SRP brass
Brand new barrel.
Berger 80.5
2.665in coal
42.3gr N555
3175 FPS. SD 5 ES 13.
Very tight. All 5 groups were easy 1/2-3/4 moa. I’ve never had to do any load dev with these bullet, same results in my 223 rem.
Barnes LRX 77
2.620in coal
41.7gr N555
3180 FPS SD6 ES 15
Dogshit accuracy. I think these need more jump. I’ll try again at 2.58in and if I can’t find anything decent I’ll dump them for Speer 75 GD or the 77 TMK
For zero load development, I’d say that’s pretty goodThey should be able to shoot tighter, no?
For this specific build, 1/2 even 3/4 moa will do. It'll be the wife's coyote/white tail gun and it's topped with a S&B 3-12 with a fairly heavy P3 reticle on a HNT26 chassis.
I have another barrel inbound from my smith for my heavy ARC CDG that will be a dedicated precision build. I promise it'll shoot like yours.
I did exactly what you plan to do for my first barrel break in. I necked down Hornady 6CM brass using a .254 bushing then used a .2225 neck expander. My loaded neck diameter was .254 using 75 grain ELD's over 38.4 grains of H4350.
Building a 22 Creedmoor, 26 “ heavy barrel. Plan to shoot Berger 85.5s using Peterson brass. What kind of free bore would you say I need? Figure I would use an alpha reamer (.120 or .165) was thinking the .120 but not sure how far I need to seat the bullets out to get some speed.
In the process of putting my 22 creed together.22” 1-8 proof barrel.
It will be a dedicated thermal coyote hunting rig so I’ll never shoot anything heavier than a 69gr tmk. Planed to shoot the berger 60 gr varmints, 62 gr varmageddons or possibly the 62 gr eldvt.
Fast and flat is the game.
Couple places i
See people suggest n540 ,rl16,rl17… has anyone run leverevolution, rl15.5 or cfe223? How was your speed and accuracy
It will be a dedicated thermal coyote hunting rig so I’ll never shoot anything heavier than a 69gr tmk. Planed to shoot the berger 60 gr varmints, 62 gr varmageddons or possibly the 62 gr eldvt.
Fast and flat is the game.
Couple places i
See people suggest n540 ,rl16,rl17… has anyone run leverevolution, rl15.5 or cfe223? How was your speed and accuracy
Had an interesting range day.
Good news:
Found a decent load with the 77LRX (pic below), they needed way more jump than I thought. I did this group at 2.575in coal (0.060 jump)
Brand new Alpha brass, CCI 450, 41.7gr N555
Bad news:
This is not a cartridge that works in the cold with N555 and SRP. I've never had an issue with the CCI 450s in 6.5 creed and H4350 in the cold but today it was barely below freezing and snowing a bit and I was getting really bad ignition issues. Make sense since N555 is slower burning than 4350.
Also tried a brand new PVA jet 6mm muzzle brake and for whatever reason, it gave me 2+ moa vertical. Very odd.
Good news:
Found a decent load with the 77LRX (pic below), they needed way more jump than I thought. I did this group at 2.575in coal (0.060 jump)
Brand new Alpha brass, CCI 450, 41.7gr N555
Bad news:
This is not a cartridge that works in the cold with N555 and SRP. I've never had an issue with the CCI 450s in 6.5 creed and H4350 in the cold but today it was barely below freezing and snowing a bit and I was getting really bad ignition issues. Make sense since N555 is slower burning than 4350.
Also tried a brand new PVA jet 6mm muzzle brake and for whatever reason, it gave me 2+ moa vertical. Very odd.
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I'd go with N540. It's the most temp stable out of that list and will easily give you 3550-3650FPS out of the 55-60gr
N550 would also work probably even better. Bit more speed, bit less pressure, bit more case fill.
Like you I live in a frozen waste land . So temp stability is something I always look for. Usually load development is in warmer weather. Try to avoid doing it in the winter incase of pressure spikes do to heat
Well if you live or plan to hunt anywhere that’s cold learn from my mistake and don’t buy 300 pcs of SRP brass. Fuck me.
I live in western ny. Supposed to drop below zero here next week. Coyote hunting in the winter I’ve never had issues with srp…. I run cci no.400’s in my 6 arc and 223
Not sure. I was running varget at first than switched to bench mark. Never an issue.
My 223 never had any problems below zero.
Varget is faster burning than N555 and a much smaller case.
I bet you staball would be fine. I’ve been running it below zero in my 7Saw with cci 450. Never had an issue either.
I wouldn't use LVR or CFE223. They are a little bit too fast of burn rate. The N550/555 or H4350/RL16 class burn rate will maximize your velocity even with bullets in the 60-69 weight grain class.
I do have some N555 but haven't tried it yet under the Nosler 64's. I will likely give this a try soon... Hornady load data lists a top velocity for 62 gr bullets in the 3850 range, and that is SMOKING.
You may be OK with SRP's in smaller volume cases like 223, but there is a very high chance for ignition issues particularly if using charges > 40 gr in very cold weather no matter what powder you run. I would without question use LRP cases.
What do ignition issues look like? Is it just the round not going off despite a good primer strike?
Worse. It goes off after a 0.1-0.2 sec delay. Feels super weird and definitely affects accuracy.
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