The 454 Casull is one cartridge that Buffalo Bore Ammunition does not load to its full pressure limit. When loaded to its full pressure potential the 454 Casull can become unreliable and unpleasant to shoot. At upper-pressure levels, heavy bullets tend to jump crimp - tying up the cylinder. (wouldn't this be great in an emergency) Also, fired brass can stick in the chambers.Specifications:Manufacturer: Buffalo BoreModel Number: 7A/20Ammo Bullet Type: LBT - Lead Flat NoseAmmo Casing Type: BrassAmmo Bullet Weight: 325 grainAmmo Round Count: 20/BoxCaliber Multi: .454 CasullMuzzle Energy: 1678 lb/ftMuzzle Velocity: 1525 fpsApplication: Performance, Protection