Heavy, hardcast, and hard-hitting! This is the heaviest load available for your .45 Colt. Whether you are hunting, deer, elk, moose, or just want something for protection against animals that bite back, this is the best .45 Colt load available. These loads are safe in all Ruger revolvers, TC Contender, Colt Anaconda, BFR revolvers, and Freedom Arms firearms. These loads are safe in all modern Model 1892 lever guns as well as all Winchester & Marlin 1894’s. DO NOT USE IN ANY OTHER FIREARM. THESE ARE NOT STANDARD PRESSURE CARTRIDGES! Operating at 27″500PSI