A shooter who still carries an older 45 Auto Rim revolver for personal defense needs more than a mild-pressure relic load, and Buffalo Bore Strictly Business 45 Auto Rim +P 255-grain Hard Cast Flat Nose ammunition (brand part no. 32A20) delivers exactly that. Buffalo Bore loads this round to +P pressure, well beyond typical factory 45 Auto Rim ammunition, yet rates it safe for any post-war 45 Auto Rim revolver in normal operating condition. The hard cast flat nose bullet is not designed to expand; instead it drives straight through heavy clothing and barriers, delivering consistent, deep penetration when it matters most. Loaded in brass cases with a flash-suppressing powder blend, this round is tuned so a shooter is not left blinded by muzzle flash after the first shot in a dark room. For anyone who still carries a 45 Auto Rim revolver for defense, this is a serious entry in our handgun ammunition selection.

Key Specifications

• The caliber is 45 Auto Rim, a rimmed cartridge built for older M1917-pattern and similar revolvers.
• The bullet weighs 255 grains, a heavy payload that favors penetration over speed.
• The bullet is a Hard Cast Flat Nose, a solid lead design that does not expand on impact.
• Because it holds its shape, the flat nose bullet drives straight through barriers and heavy clothing, prioritizing deep, consistent penetration.
• The load is rated +P, delivering higher pressure and velocity than standard 45 Auto Rim ammunition.
• The case is brass, supporting reliable extraction under the added pressure of a +P load.
• The powder is flash-suppressed, limiting muzzle flash so a shooter’s vision holds up for a follow-up shot after dark.
• Each box holds 20 rounds, with 12 boxes packed per case for shooters who want to stock up.
• At roughly $2.10 per round, the price reflects the +P pressure and hard cast bullet construction.

Frequently Asked Questions

Will +P ammunition damage my 45 Auto Rim revolver? No, Buffalo Bore rates this load safe in any post-war 45 Auto Rim revolver in normal operating condition.

Does the Hard Cast Flat Nose bullet expand? No, it is built to hold its shape and drive straight through, favoring deep penetration over expansion.

Why does this load use flash-suppressed powder? Many defensive situations occur in low light, and flash-suppressed powder helps preserve a shooter’s vision after the first shot.

Buy Buffalo Bore Strictly Business 45 Auto Rim +P

Older revolvers deserve ammunition built with the same seriousness as any modern defensive pistol load, and Strictly Business delivers exactly that. Load a cylinder and trust the hard cast bullet to do its job without hesitation. Order from our Lubbock, Texas gun shop and it ships fast to your door.