Last reviewed: 2026-04-17 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For wheelgun carriers running 45 Colt 255gr Buffalo Bore Outdoorsman ammunition in field or defensive roles, this standard-pressure load delivers 1000 fps muzzle velocity and 566 ft-lbs of energy from typical revolver barrels. Buffalo Bore built this 255-grain gas-checked semi-wadcutter projectile to stay within SAAMI specifications, which means you fire it safely in any post-war 45 Colt (Long Colt) revolver — second- and third-generation Colt Single Action Armys, Ruger Blackhawks, clones, and modern reproductions in normal working condition. The gas check prevents leading; the flat nose transfers energy efficiently on target.
Built for the Box
Buffalo Bore loads to maximum SAAMI pressure without exceeding it. The result: a load substantially more powerful than factory cowboy ammunition, yet safe in revolvers manufactured after World War II. Each round seats a 255-grain lead semi-wadcutter atop a boxer-primed brass case, non-corrosive and reloadable. The company’s owner, Tim Sundles, developed this load specifically to provide serious stopping power in standard-pressure chamberings where older firearms remain common.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 45 Colt (Long Colt) |
| Bullet weight | 255 grains |
| Bullet type | Semi-wadcutter, gas-checked lead |
| Muzzle velocity | 1000 fps |
| Muzzle energy | 566 ft-lbs |
| Rounds/box | 20 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Intended use | Self-defense |
Factory testing shows 983 fps from a 4.75-inch second-generation Colt SAA, 1053 fps from a 7.5-inch third-generation SAA, and 1047 fps from a 5.5-inch custom Ruger Bisley. Shop 45 Long Colt ammo by application.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Follow the four rules of safe firearm handling at all times.
- Verify current state and local laws before purchasing ammunition — some jurisdictions regulate ammunition sales, calibers, or projectile types.
- This ammunition contains lead, a substance known to the State of California to cause cancer and reproductive harm (Prop 65). Wash hands after handling.
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