This 45 Colt Anti-Personnel Standard Pressure Low Flash load is designed to cause disabling terminal effect, combined with the penetration required to cause fast incapacitation on human-sized targets from any angle. Expect about 24" of straight-line penetration in living mammalian material with this load. This load is "Standard Pressure" and is therefore safe for use in any 45 Colt and 454 Casull firearms. The hard cast bullet construction is properly lubed and will not substantially lead your barrel, even after hundreds of rounds.