IMPORTANT INFORMATION ABOUT THE HEADSTAMP ON THIS BRASS: Due to limited supplies of brass, Buffalo Bore has begun loading +P and +P+ ammunition in brass that may not be indicated as such on the headstamp. Example: 9mm Luger +P+ ammunition may be designated as 9mm Luger +P or simply 9mm Luger on the headstamp. Buffalo Bore loads their ammunition up to maximum SAAMI specifications, which delivers devastating performance on a wide range of game. These Heavy .45 Colt +P loads are safe in all LARGE FRAME Ruger revolvers.(includes Blackhawk, Super Blackhawk, all pre-2005 Vaquero, Bisley, Redhawk) These Heavy .45 Colt +P loads are NOT intended for the New Model Vaquero (small frame). These loads are also safe in all modern Model 1892 leverguns as well as all Winchester & Marlin 1894's Please note that this ammunition is not intended for older guns. It is made for modern firearms only, as some of the ammunition could damage older and weaker firearms. This ammunition is new production, non-c...