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Join Date: Oct 2005
Location: In the Woods Pa
Re: 45 ACP Rifle Question
Yes, the 45 acp round is rimless and shoulderless. so head spacing is a problem. It sort of headspaces on the front edge/mouth of the cartridge. Not conducive to high pressures and accuracy. the 357, 41 mag, 44 mag, and the 45 long colt have rims and are not suited to auto pistols, but are superior in a rile.
Rimless is an advantage in an auto loaded and a dis advantage in straight cases for revolvers and rifles. That is why god made half moon clips.