Prvi Partizan Supreme, 338 Lapua, 250 Grain, Boat Tail Hollow Point, 10 Round Box PPMK338 PPU is excited to announce their collaboration with Sierra bullets. Introducing: SUPREME LINE by PPU ammunition. SUPREME LINE is comprised of the best brass casings, powders and primers from PPU, and bullets from the accurate, world-class, time-proven Sierra bullets. Reign SUPREME at the range or the field with PPU and Sierra bullets!