Heavy roll crimp-

[rwsmith]

I use a spacer ring...

...with my .38 dies that fit under the locknut of the die. They are a few bucks at Midway and other places.

 

[STORMINORMAN]

I would remeasure the bullets: they might be 124gr 9mm vs. 125gr 38 cal...

Also, what device used in measuring them? Calibration?

Cheers!

 

[Imissedagain]

Take a close look at the crimp of a factory round of 357 that is considered full house....... with a magnifying glass or something similar.

 

[rwsmith]

For a long time....

I have winchester LRN around here somewhere, that the crimp was so heavy, it BOTTLE NECKED them into a wierd, almost 38/32 caliber monstrosity

...I was just really heavy handed in reloading ammo. I have since learned that if everything is set right, it takes very little effort.

 

[mtgianni]

I find that surplus powder WC 820 aka AA9 needs a heavier crimp than 2400 or 296/110. It also needs a heavier bullet. That is accomplished for me by an extra 1/4 turn on the crimp die.