.338 Lapua, Mag primers?

Discussion in 'Reloading' started by A/C Guy, Aug 23, 2010.

  1. A/C Guy

    A/C Guy Well-Known Member

    Nov 16, 2008
    I was wondering if everyone is using magnum primers in their .338 Lapua. Has anyone tried, or does anyone use standard primers? If you tried it, what did you find is different compared to reloading with the mag primers? I figured that I would ask for first hand experience before experimenting.
  2. Tikkamike

    Tikkamike Well-Known Member

    Dec 26, 2009
    I have never done it and never will. The Federal 215 Large magnum rifle primer was developed for the 338-378 wby and large capacity cases like it. In cold temperatures you need that super hot primer to get all that powder going. In warmer temperatures I believe any magnum primer is sufficient in fact now days they may all be. But I think you definatly need to stay with Magnums I am not sure a standard large rifle primer will ignite the powder efficiently. Maybe someone with more knowledge on the subject will chime in but that is the Meat of it.
  3. royinidaho

    royinidaho Well-Known Member

    Jan 20, 2004
    In addition to what Tikkamike said, I've heard that the Fed 215 is a bit hotter than the Match primer. This knowledge was gained by personal experience. Not my experience but from one who is very experience.

    Thus that's all I use in the larger magnum cartridges.

    Informative post Tikkamike!
  4. sniperjwt

    sniperjwt Well-Known Member

    Dec 27, 2009
    +1 to the above. You can under ignite the powder but i dont think you can over ignite it.