45 LC manufactured in 1959 use .451 or .452 diameter for reloads?

[reloader2]

I want to reload for a 45 long colt built in about 1959 to 1960. I want to use jacketed bullets and I am not sure to use .451 or .452 diameter bullets. Can someone tell me where I can get the info on this?

 

[Randy1911]

Most 45 Colts made after WWII will have a bore of .451. You need .451 for jacketed and .452 for lead. The ones made before WWII will be .454.

 

[loadedround]

Slug your barrel and be sure. Most manuals will give you the proper procedure and I'm sure you can also find this information on the 'net. FYI, I have two Colt's dating to the 50's and both mike out at .452".

 

[rcmodel]

I don't think you are going to find too many .45 Colt revolver bullets made in .451".

Most bullets that size are for the .45 ACP, and do not have a crimp cannulure on them like a revolver bullet.

Speer does make them in .451", and Hornady & most everyone else makes them in .452".
Sierra splits the differance and makes them .4515"!

Either one is perfectly fine for a modern .45 Colt.

rc