IMR 4198 Gun Powder This a fast burning rifle powder gives outstanding performance in cartridges like the 222 Remington, 221 Fireball, 45-70, and 450 Marlin. Varmint shooters with small-bore cartridges love it. Proven metering and necessary elements were added to make it extremely insensitive to hot/cold temperatures. IMR 4198 is outstanding in cartridges like the 222 Remington, 444 Marlin and 7.62 X 39.
