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To Crimp or Not to Crimp

Discussion in 'Handloading and Reloading' started by Hoopie, Jan 6, 2009.

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  1. Hoopie

    Hoopie Member

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    Just curious about what everyone's theory is on why and why not or when and when not to crimp a round. For some reason i don't understand why it would be beneficial when your sizing dies and case trimming should be making a uniform neck, and it takes a few real good whacks with a bullet puller to dislodge a bullet.

    Thanks,

    Hoop
     
  2. Walkalong

    Walkalong Moderator

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    To get a better burn of the powder in some applications. To keep bullets from creeping out of the case under recoil and tying up a revolver in some applications. To keep a bullet from getting jammed deeper in the case in some applications. Hmm.... what else.
     
  3. feets

    feets Member

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    Recoil is a pretty sharp impact and will move the bullet around in the case.
     
  4. Slamfire

    Slamfire Member

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    I crimp revolver ammo. I taper crimp pistol ammo. I taper crimp my 45ACP ammo to .469” as measured on the case mouth.

    I do that for function. My handgun ammunition is plenty accurate and crimping does not seem to effect accuracy.

    Handgun ammo that shoots within two inches at 25 yards is virtual match accuracy. I think the standard for Bullseye shooters is two inches at 50 yards.

    If you can’t shoot two inches at 100 yards with a rifle, something is wrong. (Lever actions and AK’s excepted)

    I don’t crimp rifle bullets. I don’t crimp any of my AR, M1, or M1a match ammo. The picture is of what happens if you over crimp 6.5 SMK bullets with a Lee Factory Crimp die. You can do this without knowing. Why mess up a perfectly good rifle bullet with crimping?

    Maybe you need to crimp for elephant guns. Got any elephants in your area?

    This weekend, the elephants in the Sugar Bowl, the Utes made them into moccasins.

    I don't want to think about it anymore.

    ReducedLeeCrimped65SMK.jpg
     
  5. Walkalong

    Walkalong Moderator

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    It was a very sad thing. :(
     
  6. Disciple882542

    Disciple882542 Member

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    :rolleyes:
    for some...
     
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