[50of4064]

I am not new to reloading long rifle but am new to 45 acp. I understand the 45 head spaces off of the mouth, the manual calls out a 0.4730 in.for the mouth of the case. After expanding, seating and crimping ( depending on the amount of crimp ) I mic out at 0.4600 in (Heavy crimp) too 0.4720 in. (light crimp)
Is there a minimum call out for the finished round at the mouth of the case after crimping?

 

[robocop10mm]

As many millions of pistols have been made in .45 acp from high end competition guns to bargain basement Zamak slide versions, the expected chamber dimensions will vary quite a bit. I taper crimp my .45 acp rounds just enough to return the mouth to parallel and screw in the crimp die about another 1/4 turn. I do not worry much about exact dimensions of the crimped surface. I just want to eliminate the belled end and hold the bullet firmly. The .45 is very forgiving of ammo unless you are shooting an ultra tight STI comp gun.

 

[G21.45]

Yup, on a 45 acp pistol, a nice firm taper crimp is the way to go! No matter what the pistol or case OAL, I always look for slight evidence of brass, 'fairy dust' on my finished rounds. If I'm getting it, then, I know the crimp die setting AND the case OAL are a perfect match for each other.

 

[50of4064]

Well thank you for the heads up and I feel better about my reloads, the only thing left to do is sendum down range. Will update later.
Hope all is well with you and your's, and again thank you.