Primer pockets: How deep?

Discussion in 'Reloading' started by bailey1474, Feb 8, 2006.

  1. bailey1474

    bailey1474 <strong>SPONSOR</strong>

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    How deep should the primer pockets be on case that uses LR primers? I'm messing w/a uniforming tool and is cutting them to .131". Most start out @ .128-.130". Is this too deep? I don't want ruin a bunch of brass b/c I'm an idiot!!

    Thanks,
    B.J.
     

  2. Bart B

    Bart B Well-Known Member

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    That sounds good to me. As long as the primers seat such that their anvils contact the pocket bottom and their top is a few thousandths below case head and the anvil preloads the priming pellet a bit, all's fine.
     

  3. Buffalobob

    Buffalobob Writers Guild

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    Primer Pocket Depths (SAAMI Specs)

    Large rifle is 0.128 to 0.132 saami page
     
  4. bailey1474

    bailey1474 <strong>SPONSOR</strong>

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    Thanks a million guys!!! I guess my .131" is ok. The only thing that concerns me in that the primer .010" deep. That seems a bit deep to me but they are going to be over .005" no matter what I do. I guess as long as my firing pin reaches them they'll do their job!!
     
  5. Jim Hundley

    Jim Hundley Well-Known Member

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    Bill,
    Just noticed your post on primer pocket depth.I had the same question.
    Forster recommends seating the primer .004".However after I have uniformed the pockets on my Lapua brass my seated primers are running from .008"-.010".I havee been told that this is to deep,but I have not experenced any problems.
    However,I now just barely uniform the pockets to just square up the outside diameter at the bottom of the pocket and just seat the primer until I feel it bottom out.I think that I was putting too much "elbo grease" into my uniforming efforts and recutting the pocket making it deeper.With my new strategy the primers are seated from .004"-.006".Can't say that there is any difference in groups,etc.,but makes me feel better!!
    Jimmy
     
  6. jb1000br

    jb1000br Well-Known Member

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    I run mine to .130 and seat .127-.128 primers about 4thou under...works for me.

    JB