The Remington⢠UMC .22-250 Remington⢠45-Grain Centerfire Rifle Ammunition is noncorrosive and primed with reloadable brass cases. Jacketed hollow-point bullet type. 1,598 ft.-lb. muzzle energy. 4,000 fps muzzle velocity. Remington UMC .22-250 Remington 45-Grain Centerfire Rifle Ammunition - Rifle Shells at Academy Sports