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Crimping?

Discussion in 'Reloading' started by Esox357, Dec 13, 2011.

  1. Esox357

    Esox357

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    For AR's do you crimp? I seen some say yes and others say they never do. One even mentioned that any bullet with a cannelure will not be used? So whats says you? Will it cause any issues with bullet set back or functioning. Mine you this will be brass fired in the same AR and used over. I was always under the impression that all semi's and lever actions required a crimp?
     
  2. creophus

    creophus Born Again

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    I have crimped and not crimped and it doesn't seem to make a difference.
     

  3. XDRoX

    XDRoX

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    The question comes up about once a month. Half the members here crimp, the other half don't. I put a slight crimp on mine.
     
  4. Steve Koski

    Steve Koski Got Insurance? Millennium Member

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    So you're half way between?
     
  5. Zombie Steve

    Zombie Steve Decap Pin Killa

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    I don't bother any more.

    It doesn't set back so much as it gets yanked out a few thousandths when it comes to an abrupt stop in the chamber. Kinda like an inertia bullet puller.
     
  6. fredj338

    fredj338

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    Yep, so I am in the slight crimp IF there is a cannelure camp.
     
  7. btwiceborn

    btwiceborn LONGTIME NOOBIE CLM

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    I crimp all 223's that have the cannelure. I sometimes taper crimp heavy bullets that have no cannelure.
     
  8. steve4102

    steve4102

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    I crimp all my auto-loaders with the Lee Factory Crimp Die cannelure or not. It not only helps secure the bullet it also increases accuracy.
    Here is a little accuracy test, LFCD vs No crimp. Note the slight increase in accuracy.

    http://www.accuratereloading.com/crimping.html
     
  9. ColoCG

    ColoCG

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    I never crimp my .223, even though most of the bullets I use have a cannelure, never had a problem in my Rock River and I get very good accuracy.
     
  10. PCJim

    PCJim Senior Member

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    No crimp here, with or without cannelure. I own a Lee FCD to apply a crimp and didn't like the way it worked the neck. I wasn't testing for accuracy, so no comment on that aspect.