45 ACP & 45 Auto Rim

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Yes, pretty much.

45 Auto rim gives you some bullet choices not suitable for a self loader.
 
Any reloading manual you look at will show slightly lower loads for .45 AR then using the same bullets in .45ACP.

That's because SAAMI pressure spec is slightly lower for .45AR.

Consult any reloading manual for tested loads.

rc
 
I load a lot of 45 Auto Rim and I drop less powder in them than I do 45 ACP. Loading manuals will show lighter charges for the Auto Rim case and it's best to follow their loads.
 
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