Measuring for Crimp

Discussion in 'The Ammo & Reloading Forum' started by Guest, Feb 24, 2003.

  1. Guest

    Guest Guest

    eapples
    Member
    Posts: 3
    (1/29/03 1:02:11 pm)
    Reply | Edit | Del All Measuring for Crimp
    --------------------------------------------------------------------------------

    Here's a real elementary reloading question...where do you position the calipers when measuring crimp? I try to position the calipers at the very edge of the case, right where it seems to crimp into the bullet, using the narrow part of the calipers. Is that correct? The reason I'm asking...I was experimenting with plated bullets of different configurations and I was running into problems with the bullet getting pushed into the case. I finally gave up with the adjustments, and now I want to get the crimp die back to where it was when I first started tinkering with it. I readjusted the crimp die to where the crimp "appears" ok, i.e., the case is not deformed. I dropped the rounds into the barrel (45acp) and they sat nicely. My current measurements vary, from .463 to .465, depending on precisely where I place the calipers on the case. Thanks for your help.

    Eapples <

    kdub01
    *TFF Senior Staff*
    Posts: 1932
    (1/29/03 1:55:37 pm)
    Reply | Edit | Del Re: Measuring for Crimp
    --------------------------------------------------------------------------------
    Welcome to the board, Eapples -

    For semi-auto pistol cartridge reloading of rimless cases, the round headspaces on the case mouth, of course. This means the crimp must be a 'tapered' crimp to allow for the proper headspacing.

    Your crimping die is usually set up to almost bottom out on the shell holder to provide the proper crimp. The bullet seater plunger may be adjusted up or down to have the bullet at the proper, or desired, depth for seating.

    You may have to 'trial and error' a few rounds to come up with the right combination you want. A kenetic bullet puller will pull the bullet so you can resize, bell and reuse the case again.
    "Keep Off The Ridgeline"
Similar Threads
Forum Title Date
The Ammo & Reloading Forum Powder Measuring Balance Recommendations Apr 18, 2010
The Ammo & Reloading Forum Problems measuring powder Feb 2, 2008
The Ammo & Reloading Forum Tools for crimped primer pockets Yesterday at 12:46 AM
The Ammo & Reloading Forum First post factory crimp vs taper dies Dec 17, 2014
The Ammo & Reloading Forum Crimping 223 without cannelure - seeking advice Nov 22, 2014

Share This Page