Buffalo Bore loads their ammunition up to maximum SAAMI specifications, which delivers devastating performance on a wide range of game. Please note that this ammunition is safe to use in older prewar revolvers in proper working condition. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases. Owner of Buffalo Bore Tim Sundles on Heavy 45 Auto Rim Ammunition: You've been asking for a couple heavy 45 AUTO RIM standard pressure loads, so by popular demand, here they are. Both of these loads utilize high quality Starline brass. We've also incorporated flash suppressed powder so you can shoot in the dark without blinding yourself and this is important because over 95% of all civilian shootings in the USA occur in low light when the criminal element is at work. Both of these loads are the ballistic equivalent of +P 45 ACP loads, yet they operate at standard 45 ACP pressures. These loads are safe to use in ANY 45 ACP revolver that is in normal operating ...