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Buffalo Bore's +P 45 Auto Rim load pairs a hard-cast 225-grain wadcutter with quality Starline brass and flash-suppressed powder to give you serious capability from a classic revolver platform. This is an elevated pressure load that approaches the performance envelope of 45 ACP +P+ ammo, yet it's engineered to run safely in all modern 45 ACP revolvers and compatible vintage guns built after World War II.
The wadcutter design creates a distinctive flat profile that produces a large, clean permanent crush cavity with straight, deep penetration in flesh and bone. The hard-cast construction resists fragmentation and bullet separation, maintaining a consistent wound path while minimizing barrel fouling even through extended shooting sessions. You're getting a purpose-built round that prioritizes terminal performance and reliability rather than relying on standard hollow point mechanics.
The formulation specifically uses flash-suppressed powder to keep muzzle flash under control when you need it most. In low-light defensive scenarios, this design consideration means you won't give away your position or lose situational awareness to your own gunfire. It's a practical feature that reflects Buffalo Bore's field-proven ammunition philosophy.
The 45 Auto Rim was developed in 1920 to let revolver users load rimmed cartridges without moon clips, solving reliability and convenience issues that plagued early military revolvers. Today's quality ammunition like this load proves the cartridge deserves serious consideration from revolver enthusiasts who want genuine stopping power. Whether you're shooting a classic M1917, a modern S&W, or any compatible 45 ACP revolver, this ammunition works reliably and delivers results.
Yes. Buffalo Bore specifically engineered this +P load to run safely in all modern 45 ACP revolvers, and it won't harm any post-war 45 ACP revolver either. The 45 Auto Rim shares the same case capacity and dimensions as the ACP except for the rim design, so compatibility isn't an issue. The +P pressure is stout, but it stays within safe operating parameters for these revolvers.
The wadcutter's flat-nosed profile creates a full-diameter wound cavity that's cleaner and more predictable than a hollow point. The hard-cast construction ensures the bullet won't fragment or mushroom unpredictably, resulting in very straight penetration with a consistent crush cavity throughout its path. For personal defense in a revolver context, this means reliable performance without modern hollow point mechanics.
Flash-suppressed powder minimizes muzzle flash, which is critical in low-light defensive situations where visible muzzle flash could blind you and compromise your response. Since roughly 95 percent of civilian shooting incidents occur in low-light conditions, this design choice reflects real-world defensive priorities rather than range performance alone.
No. Buffalo Bore hard-casts the bullets with proper lubricant, which significantly reduces barrel fouling even through extended shooting sessions. The hard-cast construction also prevents the bullet from fragmenting or separating, so you won't experience the copper or lead deposits that plague standard range ammunition.
| Caliber/Gauge | 45 Auto Rim |
|---|---|
| Case Material | Brass |
| Cost per Round | 2.20 |
| Grains | 225 gr |
| Manufacturer | |
| Manufacturer Part Number | 32C20 |
| Units per Box | 20 |
| UPC | 651815032030 |
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