Shooters Forum banner

Resize a loaded round

4K views 48 replies 18 participants last post by  unclenick 
The largest permissible size of a .45 Colt cartridge is .480 and that's what the Lee die sizes them to. The chamber dimensions according to SAAMI for the .45 Colt is .484 to .489. My chamber is .487 in my Uberti 73. The problem I have with .45 Colt when I size cases is a standard resize die will take the case down to about .468 or there about depending on who made the die. I have two different brands and they vary by .002 from each other. That works the brass way more than I'm happy with. My own opinion is SAAMI should not have allowed so much clearance in the chambers. I read they did that because older chambers used .454 diameter bullets and the tolerances back in the day were very loose so to make sure everyone's ammo worked they made the chamber sizes larger. I wish they would tighten up those tolerances.
All these numbers come from my memory so I hope I remembered them correctly. 🤔
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top