Are all 45acp dies also auto rim?

[Paddy]

My Redding set is labeled for both, but is it inherent?

 

[243winxb]

Just use the correct shell holder for each.

 

[FROGO207]

The die set is the same BUT the shell holder is different. You will have to set up each one differently as far as the belling/seating dies.

Dang, slow fingers.

 

[mahansm]

Yes, die sets, powders, bullets, and load data are the same for both. .45 Auto Rim was designed for revolvers (think S&W 25) that shot .45 ACP with moon clips so that a shooter could dispense with moon clips and use rimmed cartridges instead.

 

[rcmodel]

It was designed for the surplus S&W & Colt 1917 revolvers after WWI.
It is also used in the later .45 ACP chambered S&W revolvers, 1950 Target, Model 25, Model 625, etc.

Load data is not the same.

SAAMI pressure limits are:
.45 ACP - 21,000 PSI.
.45 ACP +P - 23,000 PSI.
.45 AR - 15,000 CUP.

Realistically, pressure limits are the same in modern guns made in the last 70 years though.
Reloading data may not be due to slight differences in case capacity.

rc