The Firing Line Forums - View Single Post - Ran 45 ACP Brass through 45 Colt Sizing Die

**44 AMP** · November 15, 2007, 12:32 AM

Oh, we've all done it, and gotten away with it mostly, sometimes just screwing up some cases, but it ain't a good idea. And a really really bad one when you are weighing and charging powder!

Book says .45 ACP is .476 at the head, tapering to .473 at the mouth. .45 Colt is .480 the whole length. Best thing would be to resize them in the correct (ACP) die. However, if they will drop into your .45acp chamber cleanly, you could just continue to load them with ACP dies. If they will not chamber properly, then you must resize them in ACP dies.

November 15, 2007, 12:32 AM	#10
44 AMP Staff Join Date: March 11, 2006 Location: Upper US Posts: 28,832	Distracted reloading...not good Oh, we've all done it, and gotten away with it mostly, sometimes just screwing up some cases, but it ain't a good idea. And a really really bad one when you are weighing and charging powder! Book says .45 ACP is .476 at the head, tapering to .473 at the mouth. .45 Colt is .480 the whole length. Best thing would be to resize them in the correct (ACP) die. However, if they will drop into your .45acp chamber cleanly, you could just continue to load them with ACP dies. If they will not chamber properly, then you must resize them in ACP dies. __________________ All else being equal (and it almost never is) bigger bullets tend to work better.