Well I have used the half mark amounts. Whether that makes the rifle more accurate, it has been places where I get the best groups shooting different projectiles. For instance, I have a Wolverine LK-II that shoots a 240 grain XTP the very best with 85 grains of Goex 3f. It will also shoot very well with 90 grains though. When I go to 2f powder then I jump the charge to 100 grains of 2f.