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Lee Challenger and dies rifle crimping

Discussion in 'Handloading and Reloading' started by JGPena, Feb 21, 2011.

  1. JGPena

    JGPena Member

    ok newbie handloader here. Just getting setup and I did a test bullet seating for .308 winchester. from my understanding cartridges for semi auto rifles should be crimped. These loads will be for a M1A/SOCOM16. When I seated the bullet for the correct length of the cartridge, there is no crimp applied. I had previously test seated another bullet and it was seated too far into the casing, but it did create a crimp. what might I have done wrong that a crimp wasn't made for the correctly seated cartridge? Im using standard Lee dies. Is it the press or dies?
  2. 243winxb

    243winxb Well-Known Member

    The crimper is fixed in the seating die. The more you screw it into/down in the press, the more it crimps.
  3. 243winxb

    243winxb Well-Known Member

    Neck Tension

  4. ranger335v

    ranger335v Well-Known Member

    "Lee Challenger and dies rifle crimping.... Is it the press or dies? "

    JC, it's the loose nut at the end of the lever! Follow the good instructions in 243's first post.

    I strongly disagree with the contents of the "exteriourballistics" site in his second post tho. What is normally being called "bullet tension" isn't. In fact, having a neck smaller than about 1 thou from the bullet is meaningless to bullet grip, it only increases the required seating effort. Stretching a neck more than about a thou simply exceeds the brass' elastic limits and only the last thou of elasticity will remain no matter how small the neck originally was. But having a neck smaller than it really should be does increase seated runout and that is NOT good for accuracy.

    Actually, I suspect the "need" to crimp autoloader bullets is greatly over stated, at least I haven't found it to be needed and I DO NOT load with "high bullet tension."

    Good luck!
    Last edited: Feb 21, 2011
  5. JGPena

    JGPena Member

    ah, gotcha, loose nut, lol. Thanks for the info. Sorry if ths info is in the Lee manual. I looked over the steps to reload that are in the manual, and I didn't notice anything about it in that section. I will look through the book more before I actually start making working cartridges. Thank you
  6. 243winxb

    243winxb Well-Known Member

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