I too use power pistol for 180gn loads in 40SW. 7.0 to 7.2 grains. Lots of muzzle flash! I also like IMR 800X for my 180gn loads too. 6.8 to 6.9 grains. 1.125" overall length works just fine. Power pistol meters very well since is a fine flake. 800X is large flake powder.