Another dumb question from a rifle newbie: crimp after seating?

Another dumb question from a rifle newbie: crimp after seating?

This is a discussion on Another dumb question from a rifle newbie: crimp after seating? within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; Hey guys, another question. I'm looking at buying a micrometer seater die for my press, .30-06 Springfield. Once the bullet is properly seated, is it ...

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  • 3 Post By glockman10mm
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Thread: Another dumb question from a rifle newbie: crimp after seating?

  1. #1
    Member Array ChrisATX's Avatar
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    Another dumb question from a rifle newbie: crimp after seating?

    Hey guys, another question.

    I'm looking at buying a micrometer seater die for my press, .30-06 Springfield.

    Once the bullet is properly seated, is it necessary to crimp? What type of crimp?

    I know, dumb, but never ask, never know.


  2. #2
    VIP Member Array glockman10mm's Avatar
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    No such thing as a dumb question.

    Unless I'm loading for a lever gun, or pump, using a bullet with a crimping groove, I never crimp.
    I don't even crimp for my AR or M1A loads
    ChrisATX, TX expat and msgt/ret like this.
    Ignorance is a long way from stupid, but left unchecked, can get there real fast.

  3. #3
    Member Array KeythL's Avatar
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    It depends on the rifle. Bolt action rifle, probably not necessary. Semi-auto\tube magazine, good idea to crimp. Find a load that works well in your rifle, then experiment with different levels of crimp to see if it improves grouping.

    Take care,

    Keyth
    ChrisATX likes this.
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  4. #4
    Member Array ChrisATX's Avatar
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    Thanks guys!

    And no case mouth belling like what is necessary with straight walled pistol ammo, correct?

  5. #5
    Member Array Fisher10's Avatar
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    Quote Originally Posted by ChrisATX View Post
    Thanks guys!

    And no case mouth belling like what is necessary with straight walled pistol ammo, correct?
    Correct. You might want to put a light chamfer on the inside edge of the case neck - especially when loading flat base bullets, but it isn't a necessity.

    For crimping rifle ammo, I'm a big fan on the Lee Factory Crimp Die. It doesn't change your OAL and it isn't sensitive to case length like most taper or roll crimp dies. It uses a collet. It is excellent when loading plinking .223 where case length is going to vary and I'm using a semi-auto.

    If your rifle is bolt action and not elephant caliber, crimping is totally optional. For a semi-auto rifle it isn't necessary as long as your neck tension is good, but I crimp to be safe.

  6. #6
    Member Array agalindo's Avatar
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    ChrisATX if you have to ask if you need to crimp a rifle round like the 30.06 then it seems that you haven't ready a good reloading manuals. I would suggest you read up before you start reloading any caliber. A good manual will explain crimping and why and were it's necessary and where, too much crimp might be very bad.

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