Different jugs of powder, different velocities

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by magedon44, Apr 1, 2014.

  1. magedon44

    magedon44 Well-Known Member

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    Dec 21, 2011
    Have any of you seen a velocity difference in one jug of powder compared to another . Today I was shooting a mixed batch of shells some from one jug some from another. One group was an inch at 300 yards dead center another group was one inch but 4 inches low. The gun was obviously shooting sub Moa but my groups confused me and all I could this was that it was the powder? Btwn each shot I waited 5 mins and was very careful of my form and level..: any ideas??
     
  2. jpd676

    jpd676 Well-Known Member

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    I am not sure what type of powder you used, but some powders vary greatly between lots. When a company makes a big batch of powder it is hard for them to make the next huge batch EXACTLY the same way. I think powders like Reloader 22 can have a big change between jugs. I try to buy 8 pounders or maybe 2 with the same lot number if I can find them. I adjust my load every time I open a new jug with a different lot number.
     

  3. Mikecr

    Mikecr Well-Known Member

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    It's normal.
    So when you find a killer load, buy up enough of that particular lot to last the barrel's life.
     
  4. catskinner

    catskinner Active Member

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    Dec 18, 2011
    Some powders have a plus3 to minus5 allowance per batch. So you can see if you get on the opposite ends you could have quite a difference.