45 ACP dies for 45 Auto Rim Brass

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What about the strength of the Auto Rim brass? I know that Smyth on Brownell’s online tutorials uses the Auto Rim brass for “soup up loads for hunting”:


But on Starline’s website I read
The .45 Auto Rim has an extra thick rim that allows it to be used without a moon clip in revolvers designed for .45 Auto/moon clip combination. It is built with the same integrity as our 45 Colt case.
Click to expand...
You would think that the extra think case rim would add greatly to the strength of the case’s web?
 
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jski said:
What about the strength of the Auto Rim brass? I know that Smyth on Brownell’s online tutorials uses the Auto Rim brass for “soup up loads for hunting”:


But on Starline’s website I read
You would think that the extra think case rim would add greatly to the strength of the case’s web?
Click to expand...

The case head on the inside may be thicker, without dissecting a case I’ll assume that’s certainly a possibility. But the composition of the brass, and any strengthening treatments, are what add the most to the overall integrity of the case. In addition, the case walls above the head that thin towards the case mouth would need to be beefier as well to be significantly stronger than the ACP (this would probably reduce case capacity a bit).

I’d stick to +P loads at max for the .45 auto rim in a modern revolver. You’ll be well served with those. :thumbup:

Stay safe.
 
Riomouse911 said:
The case head on the inside may be thicker, without dissecting a case I’ll assume that’s certainly a possibility. But the composition of the brass, and any strengthening treatments, are what add the most to the overall integrity of the case. In addition, the case walls above the head that thin towards the case mouth would need to be beefier as well to be significantly stronger than the ACP (this would probably reduce case capacity a bit).

I’d stick to +P loads at max for the .45 auto rim in a modern revolver. You’ll be well served with those. :thumbup:

Stay safe.
Click to expand...
True, it could simply be more brass added to the case rim, just so much ballast.
 
Some of the old cases were 'balloon head'; that is a cross section would show that the area between the primer cup and the inside wall is open. These, if used, need to be loaded way down.

But yes, it definitely works, I loaded them (non-balloon head cases, though) for my Dad's S&W Model of 1989.
 
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As i said, the crimp depends on what bullet you are shooting. The roll crimp is for shooting 250 / 255 grain SWC or RNFP lead bullets. Gunlaw, apparently you don't shoot 45 AR. I do and one of my best loads is a 250 gr RNFP with a roll crimp over Universal.
 
I use ACP dies for AR cases. Obviously a different shell holder is required.

I prefer roll crimps for revolver cartridges so use one for the AR. I've never had a problem with taper crimped ACP ammo in a revolver, though.

I sectioned Starline ACP and AR brass years ago (I have no idea where they went - probably the trash can - so no pictures) and saw no difference at all. If a handgun case is going to rupture, it usually will be just forward of the rim, so I seriously doubt one case is stronger than the other. With the thin walls of the typical ACP revolver, I have no reason to believe that either case will allow for seriously hot loads.
 
BW460 said:
As i said, the crimp depends on what bullet you are shooting. The roll crimp is for shooting 250 / 255 grain SWC or RNFP lead bullets. Gunlaw, apparently you don't shoot 45 AR. I do and one of my best loads is a 250 gr RNFP with a roll crimp over Universal.
Click to expand...
It’s been a while since I’ve loaded Auto Rim. I always loaded like 45 acp. Never went above 230g. I can see where a roll crimp would make sense on a heavier bullet.
 
Regardless of what anyone "believes" , I talked to Starline about their brass. Even right on their web page it says the 45 AR brass is built to the same integrity as their 45 Colt brass. On their page for the 45 Colt is says it can handle 44 magnum pressures. Starline uses different formulas for the brass they use depending on the caliber. Call them and ask them. I did.
 
BW460 said:
Regardless of what anyone "believes" , I talked to Starline about their brass. Even right on their web page it says the 45 AR brass is built to the same integrity as their 45 Colt brass. On their page for the 45 Colt is says it can handle 44 magnum pressures. Starline uses different formulas for the brass they use depending on the caliber. Call them and ask them. I did.
Click to expand...
That’s why I mentioned the composition of the brass is a factor on its overall strength :).

The true test is does the revolver have the strength :thumbup:.

Stay safe.
 
Like the others I use my ACP dies to load the Auto Rim Cartridge. I think the shell holder is an RCBS #8. I use the same loads in the AR as I do in the ACP. The H&G #130, a 185 grain button nose bullet looks sexy in the AR case!
 
Disregard, wrong thread
 

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