Questions about powder & Case changes

Discussion in 'Reloading' started by carpetman2, Feb 24, 2012.

  1. carpetman2

    carpetman2 Well-Known Member

    Jul 10, 2009
    I have been using the same brass for my 300 WM for about 4 years and with this load I'm using Berger 185 VLD's. So I got some new brass. I also ran out of my H1000 and had to get a new lot. I loaded the load I had developed with the new powder in both the old brass and the new brass. Here is my ave. velosity differences. Old cases and old powder = 2933; Old cases new powder = 2898 ; New cases new powder = 2882. Is this normal to have that kind of a change when you change lots of either powder or brass or both?
  2. diriel

    diriel Well-Known Member

    Sep 22, 2010
    Absolutely. Primers will do that as well if you change from one type or brand to another. As far as I have ever heard Lot's of powder will always vary from lot to lot no matter what label happens to be on the powder.