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Discussion Starter · #1 ·
I set up my 357 dies the other night and when I seat the bullet it crimps at the same time. This is a 4 dies set and has a seperate crimp die. Should it be crimping? It's a heavy crimp too. :? My 45 acp dies don't do that.
 

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That doesn't sound right to me. Sounds like they got the seating die from a 3-die set mixed up in a 4-die set. Mine for .38 doesn't do that.....
 

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Try backing the seating die out further and readjust the seating part of the die ;)
 

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Discussion Starter · #5 ·
XLCH said:
Try backing the seating die out further and readjust the seating part of the die ;)
You saved me lots of headache. It worked. Thank you! :D
 

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:D Your welcome, had the same thing happen to me :D
 

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Discussion Starter · #7 ·
I thought that was the voice of experience I was hearing. :lol:
 

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Just out of curosity was it roll crimping it?

The RCBS dies seat and crimp on the same operation unless you back out the die as XLCH said and then crimp with the same die screwed back in. Too much futzing around for me.
 

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Discussion Starter · #9 ·
It was just sort of crushing the very end of the case. Like a real tight crimp of sorts. :?
 

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i've been seatin' and crimpin' with that 3rd die for a lot of years and its worked fine--just a pain to get it set as ya want it.

A while back got the 4 die set for the vaquero and that crimp die is easier to get it how you want it...........
 

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Discussion Starter · #11 ·
The thing is the 3rd die isn't suposed to crimp. That's why I was confused. I should have taken a picture of one of the cases. It was more like damage than crimpage. :D
 

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What kind of dies BH ?? Are You looking at the instruction sheet ? It usually explains die adjustment methods, & die functions.
The biggest secret to a good crimp, is keeping "all" Your cases trimmed to the same length. All cases, even in new ones (even from the same batch) are not necessarily the same length, & all of them in any given caliber should be trimmed to insure not only length, but also the squareness of the case mouth. Uniformity = accuracy, & constant velocity spread !

Most .45 ACP dies are taper crimp, to leave the case mouth straight & square, because they headspace on the case mouth. Therefore it is extremely rare to need to trim semi-auto cases. They will actually "shorten" ever so slightly, from slamming into the chamber . Some will eventually become too short to fire reliably, as after "many" uses they will seat beyond the firing pin reach.
 

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Discussion Starter · #13 ·
The Dies are Lee. They are working great now. I had the die set in to deep. I think the directions were for the shorter 38 cases. Once I backed the die out some it started doing just what it's supposed to. :)
 

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Bountyhunter said:
It was just sort of crushing the very end of the case. Like a real tight crimp of sorts. :?
Ahhh yes the old mangle crimp. Have seen it before along with the belly buldge and lip bender.
 
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