Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For single action shooters and hunters who prefer traditional revolver loads, the HSM Cowboy Action 45 Colt 200 grain flat nose brings moderate recoil and reliable accuracy to range sessions and field work. Chambered in 45 Colt — also known as 45 Long Colt — this load pushes a 200 grain flat nose projectile to 750 feet per second, delivering 250 foot-pounds of muzzle energy. The flat nose profile transfers energy efficiently on impact while maintaining stability in single action revolvers with traditional rifling twist rates.
Load Profile
HSM builds this round on new brass cases with boxer primers, maintaining quality control from case mouth to crimp. The 200 grain bullet weight sits in the mid-range for 45 Colt loadings — heavy enough for clean energy transfer, light enough to keep felt recoil manageable in steel-frame single actions and replicas. At 750 fps, muzzle velocity stays subsonic, reducing barrel whip and shot-to-shot variation. Brass cases accept standard large pistol primers and reload cleanly for shooters who process their own ammunition.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 45 Colt (Long Colt) |
| Bullet weight | 200 grains |
| Bullet type | Flat Nose |
| Muzzle velocity | 750 fps |
| Muzzle energy | 250 ft-lbs |
| Rounds/box | 50 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Lead Free | No |
| Intended use | Range & Target |
| Manufacturer | HSM |
This load fits revolvers chambered in 45 Colt, including Ruger Vaquero, Colt Single Action Army, Uberti replicas, and modern large-frame single actions. For more traditional revolver ammunition, browse our 45 Long Colt ammo inventory.
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 firearm safety at all times when handling live ammunition
- Verify your state and local laws permit possession of this ammunition before ordering
- This ammunition contains lead; wash hands after handling and review California Proposition 65 warnings regarding lead exposure
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