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10 MM w/ Magnum primers

Discussion in 'Handloading and Reloading' started by 48 Months, Dec 1, 2010.

  1. 48 Months

    48 Months New Member

    Hi, I reloaded 300 rds of 10 MM 155 gr Hornady XTC JHPs in various cases
    before I realized the CCI Primers were Magnum (350). Powder is 8 grains
    of Winchester Auto Comp Ball Powder. Hodgdon says I "should" be okay (doesn't give me a warm and fuzzy), but don't load anymore w/ Magnum 350's.

    Any one have experience w/ 155 grain bullets and Magnum 350 primers?
  2. rcmodel

    rcmodel Member in memoriam

    8.0 grains Autocomp is the recommended Starting load with a 155 grain XTP according to Hodgdon manual.

    Mag primers will not make one little bit of difference in a starting load.

    Shoot them.

    BTW: Loading mixed cases is going to make far more pressure difference between rounds then switching from standard to mag primers.

  3. Damon555

    Damon555 Well-Known Member

    Shoot 'em.

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