The 22 creedmoor thread

[30338]

Pacnor 1:7" 3 groove, 22" #3 profile .090" FB...

Nice rig. Whats the stock on that one?

 

[id_jon]

How full is your case? I wonder if you could even add enough of that powder to cause pressure.

My plan is to get to 2900 and see how it speeds up from there. I want 100 pieces of brass to last the barrel so I won’t press on the gas too hard

I definitely have room in the case. I went a little overboard and bought 500 pieces of brass off the bat, so I have a few barrels worth lol. Really love shooting 88s for $.25/ea, I think I'll definitely keep a 22 creed in the stable for the foreseeable future.

 

[ridgeline]

Nice rig. Whats the stock on that one?

Thanks Kurt, That'd be McMillan's Game Hunter.

 

[Jake Leibke]

Did some test loads today for pressure. Rifle is a tikka with a 17” barrel that was a 223 then reamed out to 22 creed.

Seems like I’m a little slower then others with H4831. Didn’t really see much pressure signs with that powder. At the higher end primers were slightly flatter.

With the H4350 I got quite a bit better speeds but was seeing very slight ejector marks starting at 40 grains. Like have to reflect the light off of them just right to see it. 42 and 42.5 were more obvious.

8 shots in this group, 8 different powder charges.

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[cmahoney]

Did some test loads today for pressure.

Seems like I’m a little slower then others with H4831. Didn’t really see much pressure signs with that powder. At the higher end primers were slightly flatter.

With the H4350 I got quite a bit better speeds but was seeing very slight ejector marks starting at 40 grains. Like have to reflect the light off of them just right to see it. 42 and 42.5 were more obvious.

8 shots in this group, 8 different powder charges.

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Sorry if I missed it but what is you barrel length?


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[Jake Leibke]

Sorry if I missed it but what is you barrel length?


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Sorry I forgot to add that. I’ll edit it for future.

It measures 17” from front side of action to end of barrel.


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[cmahoney]

Sorry I forgot to add that. I’ll edit it for future.

It measures 17” from front side of action to end of barrel.


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Great info thanks, 3200 fps is awesome.


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[willfrye027]

Sorry I forgot to add that. I’ll edit it for future.

It measures 17” from front side of action to end of barrel.


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Good lord that is screaming. Might want to load a few up at your desired charge and make sure you don’t lose the primer pockets in 1-2 reloads, if that is something you care about.

 

[Jake Leibke]

Good lord that is screaming. Might want to load a few up at your desired charge and make sure you don’t lose the primer pockets in 1-2 reloads, if that is something you care about.

I’ve got 10 loaded up with the 4350 at 40.5 grains to seem how that groups. I was hoping to get at least 3000 fps so that gets me there and doesn’t seem like it pushing it to much. I might try that. Thanks for the tip.


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[willfrye027]

I’ve got 10 loaded up with the 4350 at 40.5 grains to seem how that groups. I was hoping to get at least 3000 fps so that gets me there and doesn’t seem like it pushing it to much. I might try that. Thanks for the tip.


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I like to push the envelope on pressure, so usually I’ll put aside 3 pieces of brass to reload over and over. Helps make sure subsequent reloads will have the same POI and velocity, and also helps avoid trashing expensive brass with too hot of a load!

 

[BjornF16]

Did some test loads today for pressure. Rifle is a tikka with a 17” barrel that was a 223 then reamed out to 22 creed.

Seems like I’m a little slower then others with H4831. Didn’t really see much pressure signs with that powder. At the higher end primers were slightly flatter.

With the H4350 I got quite a bit better speeds but was seeing very slight ejector marks starting at 40 grains. Like have to reflect the light off of them just right to see it. 42 and 42.5 were more obvious.

I’m running 3180 fps from 22” barrel using Peterson SRP brass and GM205M primer and 41.0 gr H4350

 

[wind gypsy]

For those that haven't seen it, Peterson has 22 creedmoor load data on their website. My main takeaway from it was that it seems like lots of people are prone to loading them very hot and saying they didn't see pressure because the brass is so tough.

https://www.petersoncartridge.com/media/1367/22-creedmoor-press-release.pdf

They are showing 40.0 gr H4350 with a 90 SMK @ 3250 FPS through a 24" barrel @ 84,693 PSI.. it seems their barrel is likely a shorter throat than many but I'd not be playing with those types of pressures. Would be helpful if they provided chamber and bore land/groove specs since it's not SAAMI.

 

[Lawnboi]

For those that haven't seen it, Peterson has 22 creedmoor load data on their website. My main takeaway from it was that it seems like lots of people are prone to loading them very hot and saying they didn't see pressure because the brass is so tough.

https://www.petersoncartridge.com/media/1367/22-creedmoor-press-release.pdf

They are showing 40.0 gr H4350 with a 90 SMK @ 3250 FPS through a 24" barrel @ 84,693 PSI.. it seems their barrel is likely a shorter throat than many but I'd not be playing with those types of pressures. Would be helpful if they provided chamber and bore land/groove specs since it's not SAAMI.

I’m just geuessing but my plan is to hopefully load at 38-39 grains of h4350 from all the reading Iv done.

Sounds like this alpha brass can take beating without you knowing

 

[JGRaider]

I've got a Tikka T3X 6.5CM that I'd love to swap barrels into a 22 CM. Anyone make a good prefit, steel barrel?

 

[PsRpOiGrRiAtM]

I've got a Tikka T3X 6.5CM that I'd love to swap barrels into a 22 CM. Anyone make a good prefit, steel barrel?

From what I've seen, Preferred Barrel Blanks seems to be mentioned a lot. I'll be looking at them for one soon.

 

[Lawnboi]

I've got a Tikka T3X 6.5CM that I'd love to swap barrels into a 22 CM. Anyone make a good prefit, steel barrel?

Look at the first post. That’s a PVA prefit. I’ll be updating as time goes, should be able to shoot for some velocity tomorrow

 

[Coyote Assassin]

I’m going to start with h4350 with 88eldm. Curious on how @id_jon ends up with 4831 because I might buy some to hang onto my h4350 for other rifles. We will see.

Finding headstamped 22creed brass is easy now. Peterson, alpha and Hornady are making it. Iv got 100 pieces of alpha SRP 22 creed brass that I’m hopefully going to kill this barrel with, I’m hoping I get Atleast 1000 round barrel life out of it.

The above barrel is a shouldered tikka prefit. Iv also got a 6 creed prefit from PVA but it’s 26” and 7 pounds.an 18” 6 creed is also on my short list for a suppressed hunting gun. I’m hoping to hit 2900-3000 with the 88s in the 22 cree

I'm kind of wishing I'd have gone shorter, I'm at 2.715 to get the base of boattail to the base of the neck. Not going to measure my jump, but it will be big. Worst case, I'll just get some 95s, but I bet it will shoot fine.

From the published data I've seen for 22 Creed and 22-250ai, seems like 4350 is a touch fast, so I'm saving it for my 6 and 6.5. 4831/sc should be good, and sounds like h1000 or rl26 is even better.

My first post here. I think you will find that your suspicion that the 4350 is a little too fast for the .22 CM, is right on the money. I have 2 of them and have tested a bunch of different powders, and came to the conclusion that 4350 would pressure out before you could get to the upper velocity node. I have always had the best accuracy in the velocity node around 3550. That's out of a 21 inch suppressed barrel shooting the 69 gr. Lapua Scenar. I've shot RL26 the most and it yields the best velocity with a relatively smooth pressure curve. Outstanding accuracy is the norm.

 

[BjornF16]

My first post here. I think you will find that your suspicion that the 4350 is a little too fast for the .22 CM, is right on the money. I have 2 of them and have tested a bunch of different powders, and came to the conclusion that 4350 would pressure out before you could get to the upper velocity node. I have always had the best accuracy in the velocity node around 3550. That's out of a 21 inch suppressed barrel shooting the 69 gr. Lapua Scenar. I've shot RL26 the most and it yields the best velocity with a relatively smooth pressure curve. Outstanding accuracy is the norm.

I’m running H4350 with 88 ELD-M…seems to be good pairing in 7 twist barrel. With 41.5 grains I was exceeding 3200 fps from 22” tube, but getting some ejector swipes. Backed off to 41.0 and at 3180 fps (SRP and GM205M)

Interestingly, 41.0 gr H4350 works well in my 6XC launching 108 ELD-Ms

 

[Jake Leibke]

My first post here. I think you will find that your suspicion that the 4350 is a little too fast for the .22 CM, is right on the money. I have 2 of them and have tested a bunch of different powders, and came to the conclusion that 4350 would pressure out before you could get to the upper velocity node. I have always had the best accuracy in the velocity node around 3550. That's out of a 21 inch suppressed barrel shooting the 69 gr. Lapua Scenar. I've shot RL26 the most and it yields the best velocity with a relatively smooth pressure curve. Outstanding accuracy is the norm.

I read on the snipers hide 22 creed thread that guys were having issues with R26 getting carbon rings and building pressure. Did you experience that at all?


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[Coyote Assassin]

I’m running H4350 with 88 ELD-M…seems to be good pairing in 7 twist barrel. With 41.5 grains I was exceeding 3200 fps from 22” tube, but getting some ejector swipes. Backed off to 41.0 and at 3180 fps (SRP and GM205M)

Interestingly, 41.0 gr H4350 works well in my 6XC launching 108 ELD-Ms

4350 is a good powder in the .264 bore and the Creedmoor case. The 6.5 bore has about 35 to 40% more bore volume than the .224 barrel (depending on actual bore diameter .218 vs. .219, and land / groove geometry). That larger bore will handle the quicker upstroke of the pressure curve better than the smaller bore. A good example of that is the BR cases. The .22 BR works well with something like VV N-140 and the 30 BR is typically shot with the significantly faster 4198. If you could come up with some 4831, RL26 (good luck finding any of that) or VV N-565 I think you will find that you very well be able to tune to the next higher accuracy node and not run into pressure issues. Every time I've tried 4350 I have not been able to get to the best accuracy node because it ran into pressure before I could hit the right velocity.