Buffalo Bore loads its Standard Pressure .45 Auto Rim (load no. 31A20) around a 255-grain hard cast flat nose bullet built on Starline brass, giving owners of classic .45 ACP revolvers the ballistic equivalent of +P .45 ACP power while running at ordinary .45 ACP pressure levels. Buffalo Bore rates this load safe in any .45 ACP revolver in normal operating condition, including the historic Model 1917 Colt and Smith & Wesson revolvers it was designed around. The flat nose hard cast bullet holds its shape rather than expanding, driving straight-line penetration instead of a wide wound channel. Buffalo Bore also loads the round with flash-suppressed powder, so a shot in low light will not blind the shooter. In handgun ammunition built for a classic revolver, this is serious performance without the pressure risk.

Key Specifications

• The chambering is .45 Auto Rim, loaded here to standard, not elevated, pressure.
• The bullet weighs 255 grains, substantial mass for straight-line penetration.
• The bullet is a hard cast flat nose, built to hold its shape rather than expand.
• This load is the ballistic equivalent of +P .45 ACP power while running at standard .45 ACP pressure levels.
• Cases are built on Starline brass, a premium component known for consistent quality.
• The load uses flash-suppressed powder, protecting the shooter’s vision after a low-light shot.
• It is rated safe in any .45 ACP revolver in normal condition, including the Model 1917 Colt and Smith & Wesson.
• Per-round cost runs about $2.10, reflecting the heavy hard cast bullet and premium brass.
• Each box holds 20 rounds, and the line ships 12 boxes to a case.

Frequently Asked Questions

Does this hard cast flat nose bullet expand? No, it is built to hold its shape and drive deep, straight-line penetration instead of opening wider.

What does ballistic equivalent of +P .45 ACP mean? This load matches +P .45 ACP power and performance while operating at standard, not elevated, chamber pressure.

Is this safe in a Model 1917 revolver? Yes, Buffalo Bore rates it safe in any .45 ACP revolver in normal operating condition, including the Model 1917 Colt and S&W.

Buy Buffalo Bore .45 Auto Rim Ammo

A classic .45 Auto Rim revolver deserves ammunition that respects its age while still delivering real power, and this standard-pressure load does exactly that. Load up knowing the hard cast bullet and Starline brass were built for a gun like yours. Order from our Lubbock, Texas gun shop and it ships fast to your door.