new loads

Discussion in 'Reloading' started by RICHCAS, Nov 25, 2011.

  1. RICHCAS

    RICHCAS New Member

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    Nov 25, 2011
    when working up new loads , I was at the high end and was increasing by .2 of a gr. my jump from 66.2 grains to 66.4 showed my average fps drop by 30. the chrono doesn"t lie. the rifle is a model 70 win in 264 win mag. it has happened before. Anyone have an answer.
     
    Last edited: Nov 26, 2011
  2. Mikecr

    Mikecr Well-Known Member

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    Aug 10, 2003
    I've never seen more powder cause less velocity.
     

  3. bman73

    bman73 Well-Known Member

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    Feb 22, 2011
    Not a hot enough primer to ignite all the powder uniformly would be the only reason I can think of that happening. Mind you I would think that it would take a change of more than .2 of a grain to see a drop in MV that much. Mind you I have been surprised before and I'm sure I will be again as well
     
  4. RICHCAS

    RICHCAS New Member

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    Nov 25, 2011
    Thank you BMAN73.
    I was considering federal 215m but used up leftover wlrm. I will switch over and see what the difference is. The problem had me confused. You at least came up with a possible answer. lightbulb
     
  5. devildogandboy

    devildogandboy Well-Known Member

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    Oct 20, 2011
    could you be more specific about the bullet weight, primer and powder? are you using all the same brass(manufacturer)?