For anyone who says they can't find pistol powder, Midsouth has Longshot at $141 per 8 pound jug. Buy the haz mat limit, which is 48 pounds, and even after shipping and Haz Mat fee, it will come out way cheaper than any LGS (no tax if you live out of state).
Longshot is great for any non magnum pistol application. I use it in 9mm, 45 acp, 40SW, 38 spl, and 44 spl. Longshot is great and cheap.
For SMG applications, my MP5s have run on a 90% diet of Longshot, and they run beautifully, everytime.