crimping to much or not enough?

Discussion in 'The Ammo & Reloading Forum' started by Sherrer1*, Jul 17, 2012.

  1. Sherrer1*

    Sherrer1* Member

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    Im reloading 40s&w and using lee dies. My question is how do you know if you have to much crimp or not enough.:confused:
  2. gdmoody

    gdmoody Moderator Supporting Member

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    You need just enough crimp to close the "Bell mouth". If the crimp is curled into the bullet then you have too much. If you can feel the "bell", then you don't have enough.
  3. steve4102

    steve4102 Former Guest

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    Measure it. It should be around .421 inches. It should also NOT be pressed into the bullet. Only apply enough crimp to remove the flare, plus a thou or two.
  4. Killcreek

    Killcreek New Member

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    [​IMG]



    If they come out looking like this, its too much.
  5. jack404

    jack404 Former Guest

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    if a .40 S&W comes out like that i'm giving up drinking while reloading for good !!!

    i actually go by feel as gdmoody above stated and try to pull the projectile if i can start to move or pull the projectile with easy finger pressure i tighten it a tad
    Last edited: Jul 18, 2012
  6. The_Vigilante

    The_Vigilante New Member

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    Try pulling one of your bullets after reloading to check the crimp. If you can see the indentations of the crimp, etc you have too much crimp.
  7. Gahunter12

    Gahunter12 Active Member

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    I set my crimps to .421" on my 40s&w loads. You may get some that come out at .420", and some may read .422". It all depends on case thickness. The way you figure this is measure the case thickness at the mouth (.010") then double it (.010 x 2 = .020"). Then add that to the bullet diameter (.401" + .020" = .421"). This should give you a nice crimp like gdmoody said.
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