federal Mag. primers 1 thousands biger than CCI

Discussion in 'The Ammo & Reloading Forum' started by billr, Mar 29, 2005.

  1. billr

    billr New Member

    Oct 15, 2004
    Could not get Federal Magnum primers to go with out pushing very hard , bought some CCI they fit easy they are one thousands different I am usung GI brass in a 223 with great results untill this has come up, the CCI resolved the problem .
  2. HI-5-O

    HI-5-O New Member

    Dec 19, 2004
    Interesting to note that. I've only used CCI and now Winchester primers in my Lee Progressive press. Lee's instructions warns you to not use Federal primers in their presses. Now I know why.


  3. inplanotx

    inplanotx Active Member

    Jan 28, 2002
    Well, several questions here.

    1) Are the primer pockets swaged since it is military brass?

    2) What load are you using?

    3) WHY magnum primers in such a small case?

    Magnum primers raises pressures in a small case. This can lead to problems.

    I have never had a problem with Federal primers in GI 5.56mm brass as long as the primer pocket is properly swaged!
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