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Crimping?

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

  1. 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

    1,031
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    Mar 18, 2005
    Florida
    I have crimped and not crimped and it doesn't seem to make a difference.
     


  3. XDRoX

    XDRoX

    6,325
    2,130
    Jan 24, 2009
    San Diego
    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

    7,059
    1
    Jan 31, 1999
    Montanuh
  5. Zombie Steve

    Zombie Steve Decap Pin Killa

    18,083
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    May 31, 2007
    Old Colorado City
    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

    21,721
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    Dec 22, 2004
    so.cal.
    Yep, so I am in the slight crimp IF there is a cannelure camp.
     
  7. btwiceborn

    btwiceborn LONGTIME NOOBIE CLM

    116
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    Aug 7, 2006
    spartanburg, sc
    I crimp all 223's that have the cannelure. I sometimes taper crimp heavy bullets that have no cannelure.
     
  8. steve4102

    steve4102

    2,312
    674
    Jan 2, 2009
    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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    Mar 18, 2011
    Colorado
    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

    2,950
    1
    Aug 4, 2008
    FL
    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.