22 creedmore - who's tried one?

[Mark W]

When I was thinking of a 22-243 the smith doing my chamber tried to talk me into a 22 Creedmoor. He said it was same speed with a little less powder. I wasn’t ready to board the Creedmoor train so I went 22-243ai.

 

[TGP]

I have a 22 Creedmoor in an XP 100, 16" barrel, 1-7" twist. With 90 grain MK's I'm in the low 3000's f.p.s. range using RL 26. I purchased some SRP 6 Creedmoor brass to see how it would perform, using RL26 and CCI 450 primers it didn't work @ 45-50 degree weather, velocities was all over the place. Went back to using Hornady brass with CCI 200's and everything went back to normal. I plan on trying some faster burning powder with the srp later. And for what it's worth, the Peterson brass I have with small primer pockets looks like great brass and is very uniformed.

Glenn

 

[xswanted]

A 22-250Ai is basically the same thing.

40* shoulder vs the 30* in the Creedmoor.

Same case more or less.

I have a 22-250AI and wouldn’t trade it for the 22 creed. If I didn’t have the ackley it would be a toss up as which one is build.

 

[284winner]

A 22-250Ai is basically the same thing.

40* shoulder vs the 30* in the Creedmoor.

Same case more or less.

I have a 22-250AI and wouldn’t trade it for the 22 creed. If I didn’t have the ackley it would be a toss up as which one is build.

Basically the only advantage is not having to fireform brass with the 22 Creedmoor. I believe the rest is very close performance wise.

 

[venatic]

This may be of interest. Been shooting the 22 Creedmoor for a few years now.

https://www.facebook.com/video.php?v=1257567401012085

 

[Clancy]

I THINK THAT WOULD BE CLOSE TO A 22-250 MAY NOT BE WORTH DOING

I thought so too until I built a 22 Lapua. Not even in the same galaxy in the real world.

 

[Clancy]

I’ve got to get one thing out there... I have a 22 Lapua, which despite what a lot of folks say is just about the same thing in real time...

I love the rifle I built in 22x47. Truthfully, if there’s a finer coyote rifle out there I’d like to see it. However, this cartridge fills a niche that almost doesn’t exist. It’s easily outshined on steel by any number of things, and it is FAR too much for any varmint or predator.

That being said.. I’ll probably rebarrel to 22x47 again since I’m invested, but I’d suggest a 22-250 or 6x47 to anyone else.

 

[linebaugh]

My .22-250AI holds 50gr of water. The .22 creed holds 52gr water and the .22-243 holds 54gr water. All in my guns after firing. Lapua makes brass for all the above but from my experience my next reamer is going to be a slightly modified 22 creed that will allow about 53gr capacity and a longer throat for 90-95 gr bullets.

Those who say the 22250AI does not feed well likely have no experience with a 22250AI. I run this round in my PRS rifle and have had zero problems. The truth is you will probably have more issues with a standard 22250 feeding reliably due to the taper of the case affecting the feed geometry... especially in AI mags.

 

[stacy]

I thought so too until I built a 22 Lapua. Not even in the same galaxy in the real world.

REALLY SO ? WHAT IS 22 LAPUA

 

[steve123]

REALLY SO ? WHAT IS 22 LAPUA

It's the small primer pocket giving more strength to the lower part of the x47 Lapua case, maybe metallurgy too.

Lapua creed brass is now available with small primer pocket brass which probably evens up the score.

Either one will handle more pressure than American large rifle primer 22-250 brass.

The different 22-250's I've had in the past, using American brass, would expire within 10 cycles, the x47L brass I have now is showing almost no signs of giving out at 36 or so cycles and that's with warm loads.

Lapua brass is just great stuff.

 

[Brians356]

pretty much a 22-250 AI, with bit better shoulder for feeding, no?

Bingo. Essentially a 22-250 AI 30-deg. There's very little new under the sun.
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[Brians356]

I have one, my coyote calling partner has one, my gun smith is building one, my other smith is considering one and another buddy built one. With the release of the lapua small pocket 6.5cm brass, it's a no brainer. It runs away from a 22 x47L and 22-250. Running the 80.5 bergers over 3400 from a 22" 8twist. Barely any recoil and a pleasure to shoot.

Do it, you won't be sorry.

What does the small rifle primer gain you (in practice, not in theory)?
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[Bill K]

Can not find the article now, to say where it was, but some have been doing some testing with these case's and the usual powders used in them, i.e. 4350, etc. and have found that with cooler temp/weather the SR primers do not give a consistent ignition as the LR case's. Something to consider when you work with and go with these case's i.e creedmoor one's.

 

[Brians356]

I have a 22 Creedmoor in an XP 100, 16" barrel, 1-7" twist. With 90 grain MK's I'm in the low 3000's f.p.s. range using RL 26. I purchased some SRP 6 Creedmoor brass to see how it would perform, using RL26 and CCI 450 primers it didn't work @ 45-50 degree weather, velocities was all over the place. Went back to using Hornady brass with CCI 200's and everything went back to normal. I plan on trying some faster burning powder with the srp later. And for what it's worth, the Peterson brass I have with small primer pockets looks like great brass and is very uniformed.

Glenn

Read Lane Pearce's article in the latest issue (May 2018) of Shooting Times. Twice the design powder capacity for SRP, cool temperatures, and (especially, but not exclusively) double-base powders were singled out as problematic by three different respected industry reps. And Lane's test data themselves did not suggest a significant correlation between primer size and accuracy in 6.5 Creedmore.

(Food for thought. Hold the catcalls, please. I'm not claiming Lane's testing, or the comments from three industry experts, prove anything. But it would be just as difficult to prove SR primer is better across the board in the Creedmoor case. I would venture to say your mileage will vary more with SRP.)
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[Brians356]

My .22-250AI holds 50gr of water. The .22 creed holds 52gr water and the .22-243 holds 54gr water. All in my guns after firing. Lapua makes brass for all the above but from my experience my next reamer is going to be a slightly modified 22 creed that will allow about 53gr capacity and a longer throat for 90-95 gr bullets.

Those who say the 22250AI does not feed well likely have no experience with a 22250AI. I run this round in my PRS rifle and have had zero problems. The truth is you will probably have more issues with a standard 22250 feeding reliably due to the taper of the case affecting the feed geometry... especially in AI mags.

What's the shoulder angle on your 22-250 AI?
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[linebaugh]

Brians356

It's 40 degrees and this chamber is tight. I would assume that with my old chamber I was probably closer to 51+/-gr but I never checked it.

For what it's worth we checked a friends 220 swift last week and it held just shy of 51gr on a fired factory ruger chamber.