This heavy 45 auto rim standard pressure loads utilize high quality starline brass with flash-suppressed powder to shoot in the dark without blinding yourself.It is the ballistic equivalent of +p 45 acp loads, yet they operate at standard 45 acp pressures.They are safe to use in any 45 acp revolver that is in normal operating condition, including any model 1917 colt or s&w revolver.Caliber: 45 Auto RimBullet Type: Wadcutter (WC)Bullet Weight: 225 grMuzzle Energy: 451 ft lbsMuzzle Velocity: 950 fpsRounds Per Box: 20Boxes Per Case: 12Application: Target ShootingCasing Material: BrassHazair: Yes