how to test when changing powder lots

Discussion in 'Reloading' started by dmax1800, Oct 16, 2013.

  1. dmax1800

    dmax1800 Well-Known Member

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    May 8, 2013
    How or what to do to test for accuracy when changing powder lots. I'm loading for a 270 win with H4350 powder and don't have a lot of data on velocities with different powder charges. I'm done some searches and cant' find the answer to this question.

    Do I start over and test from min to max powder charge in .5 grain increments? Or do I find the powder charge just starting to show pressure signs and then back off 2 grains? Or do I vary powder to get the same velocity of the most accurate load in the previous lot?

    Thanks.
     
  2. Mikecr

    Mikecr Well-Known Member

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    Aug 10, 2003
    I'd back off a couple grains & increment back up into restored grouping. -No other changes-
     

  3. nwkman

    nwkman Well-Known Member

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    +1 on this