I use PPU in my 1911s, my M1917, my M1-carbine, my New model Blackhawk, my M-57, my 357 target revolver, my Bersa Thunder, my M1911 Schmidt-Rubin, and my #1 MK 4. The only one I don't use it in is my Serbian SKS...that likes Igman better. My Hi power likes Sellier & Bellot.