C
Carl Bouge
Guest
I have a Sako 75 varmint in 22ppc. I use Lapua brass. I have turned the necks so a seated bullet measures .002 under the chamber diameter. The gun shoots great usually in the .2 or .3"s. The problem I am having and cannot figure out is when I shoot V133 powder in it, I end up with case powder residue blow back on the shoulder and sometimes even on the side of the cases. If I shoot Benchmark powder I have zero residue and everything looks perfect. I have played with the headspace and only I bump my shoulder back to where the bolt close freely but with a little tension. Cannot really bump it back anymore without making it hard to close the bolt. I cannot figure out why one powder does this and the other one does not??? I have about 6 lbs of the V133 laying around that I use to use in my 6ppc and would like to make use of it. Hoping maybe someone has ran into this problem before and can help me out.