250 savage AI formed from 6.5 creedmoor

[foxhunter]

before firing and after firing of case. seeing that winchester only make 250 savage brass once ever 5 years the 6.5 creedmoor brass is a welcome alternitave. brass weighs 1 gr less than the winchester.

 

[dewey7271]

Sounds like a good idea.
FWIW, Hornady just started making 250 brass. It's listed on their site.
In the past I've taken Hornady 22-250 brass, run it through a 250 die, loaded it and fireformed. Not near as bad as it sounds. Worked well.

 

[Brians356]

Fireforming 22-250 "bulletless" works great for me, and plenty of "premium" 22-250 brass is available, as well as once-fired scrounged at your local shooting range.

 

[Brians356]

before firing and after firing of case.

Did you form that "bulletless"?

 

[foxhunter]

Did you form that "bulletless"?

formed with bullets.
in the past i too have formed from 22-250 but feel there is less stress on the necks forming down from 6.5 rather than up from 22-250.
loads were plenty good enough for hunting when fire-forming.

 

[Baddog0302]

Sounds like a good idea.
FWIW, Hornady just started making 250 brass. It's listed on their site.
In the past I've taken Hornady 22-250 brass, run it through a 250 die, loaded it and fireformed. Not near as bad as it sounds. Worked well.

Great idea and it will work in reverse as well . Take note all that post on an almost daily basis a WTB 6.5 CM or 6.5X47L brass.

 

[Brians356]

formed with bullets.

So did you just neck down to 25 cal. or run though an AI FL die? What was the headspace at the datum before firing them?

Edit: Or rather I should ask: Was there a slight crush fit at the neck/shoulder junction?

(I ask because I haven't yet compared cartridge/chamber dimensions to deduce how the shoulders line up.)

 

[SeabeeKen]

Ordered some 25 Creedmoor brass to form into 250ai. Looking at drawings, it appears the body will squeeze down about .005 and the shoulder neck junction moves back a few thousandths. A outcome will be that permissible pressure of 250 should go up as the creedmoor cases are made for 62,000 psi and the savage was 52,000. Will still be working up slowly though

 

[SeabeeKen]

Update on this. Bought alpha 25 cm brass and reformed. As i approached max loads i started getting clickers. The case head on cm brass is .470 and 250 is .467. Aside from that it worked great. I suspect hornady took the 250ai and put a 30° shoulder on it, 308 head diameter and called it a cm considering how accurate the 250ai is

 

[Minshooter]

And I thought I knew everything.
What is a "clicker"?
Thanks

 

[Brians356]

I suspect hornady took the 250ai and put a 30° shoulder on it, 308 head diameter and called it a cm considering how accurate the 250ai is

That makes no sense. Look at the extractor groove design on CM versus 250 Savage. Radically different. There's no way Hornady would or could base any CM case on a 250 Savage. Nor could they start with a "250 AI" anyway since it doesn't exist as a SAAMI case.
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[std7mag]

So wait....
You can form 250AI from the CM line, but not straight 250 Savage?

 

[Brians356]

So wait....
You can form 250AI from the CM line, but not straight 250 Savage?

Who asserted that?
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[SeabeeKen]

That makes no sense. Look at the extractor groove design on CM versus 250 Savage. Radically different. There's no way Hornady would or could base any CM case on a 250 Savage. Nor could they start with a "250 AI" anyway since it doesn't exist as a SAAMI case.
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Im not necessarily referring to each detail. There is .007 wider shoulder, .003 wider case head on the cm, very similar. Put them side by side, very little difference In the 250ai and 25 cm. Cm brass works in some 250ai chambers and some not. It depends on how tight the camber is cut on the ai. Clickers are when brass expands in the head area and becomes tight in the chamber and the bolt has to cam out the empty and causes a click. It happened in my rifle.

 

[Brians356]

Im not necessarily referring to each detail. There is .007 wider shoulder, .003 wider case head on the cm, very similar. Put them side by side, very little difference In the 250ai and 25 cm. Cm brass works in some 250ai chambers and some not.

Got it. Preaching to the choir, actually, as I've said as much myself:

Post in thread '250-3000 Ackley Improved......' https://forum.accurateshooter.com/threads/250-3000-ackley-improved.3984159/post-37549363
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