These +p 45 auto rim loads use high quality starline brass with flash-suppressed powder to shoot in the dark without blinding yourself.Both of these loads are the equivalent of +p+ 45 acp ammo, also known as 45 super.These are very stout loads, but will not harm modern 45 acp revolvers, nor will these loads harm any post-war 45 acp revolvers.Feel free to safely shoot these loads in any post war 45 acp revolver in normal good operating condition.Rating: +PCaliber: 45 Auto RimBullet Type: Hard Cast Flat Nose (HCFN)Bullet Weight: 255 grMuzzle Energy: 566 ft lbsMuzzle Velocity: 1000 fpsRounds Per Box: 20Boxes Per Case: 12Application: Performance,ProtectionCasing Material: BrassHazair: Yes