? large rifle primers vs large rifle magnum primer

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  Tailgunner1954 Member Posts: 7,734 ✭✭

  May 2009 edited November -1

  Yep, as a rule of thumb drop back 2gr and work your way back up 1/2gr at a time until your groups/velocity come back

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  Fireman Mike Member Posts: 3 ✭✭

  May 2009 edited November -1

  Thank you very much. I almost out of large rifle, but still have 4000 magnum.

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  DENWA Member Posts: 390 ✭✭✭

  May 2009 edited November -1

  Just FYI,
  
  If using 308 or similar size case, reduce your load about 1 grain.
  
  If 30-06 or larger, you'll notice very little difference if any.
  
  I actually prefer them in my 30-06 with heavy loads of IMR4350.

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  bpost Member Posts: 32,664 ✭✭✭✭

  May 2009 edited November -1

  From my experience the difference is not noticeable. If you are on the top edge of the load I would back down .3 and try it first.
  
  I do not load standard rounds that hot so the substitution is never a problem and may improve your group size.

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  k_townman Member Posts: 3,588

  May 2009 edited November -1

  Yup, it all sounds good to me. Have fun.

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