Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Winchester Defender PDX1 45 Colt PDX1 ammo brings FBI-protocol defensive engineering to a revolver cartridge with century-old roots. The 45 Colt (Long Colt) is a straight-walled pistol round firing bullets from .452″ jacketed projectiles, and this 225-grain bonded jacketed hollow point maintains structural integrity through intermediate barriers while initiating controlled expansion on soft tissue impact. Winchester’s proprietary bonding process welds the lead core to the copper jacket, reducing core-jacket separation and increasing retained weight after barrier penetration. Muzzle velocity of 850 feet per second and muzzle energy of 361 foot-pounds position this load for close-quarters defensive use in revolvers chambered for 45 Colt.
Performance Profile
The bonded core construction in this Winchester PDX1 load addresses the historical challenge of conventional hollow points: jacket separation during barrier penetration. By welding core to jacket before hollow-point formation, Winchester ensures the bullet maintains mass and expansion characteristics through drywall, plywood, and heavy fabric. Six proprietary notches in the jacket create equal-segment peeling during expansion, targeting 1.5x original diameter in calibrated gelatin. Nickel-plated brass cases reduce friction during extraction under recoil-induced carbon buildup, and Boxer primers allow reloading after initial firing. The 225-grain projectile weight balances penetration depth with expansion diameter in FBI heavy-clothing protocols.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 45 Colt (Long Colt) |
| Bullet weight | 225 grains |
| Bullet type | Bonded Jacketed Hollow Point (PDX1) |
| Muzzle velocity | 850 fps |
| Muzzle energy | 361 ft·lbs |
| Rounds per box | 20 |
| Case | Nickel-plated brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Intended use | Self-defense |
| Manufacturer | Winchester |
Winchester manufactures this load in the United States to SAAMI pressure specifications for 45 Colt revolvers. Verify your revolver’s cylinder length accommodates standard 45 Colt cartridge overall length before ordering. Additional defensive-rated 45 Long Colt ammo options on the site include lighter grain weights for reduced recoil and faster follow-up shots in snub-nose frames.
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.
- Treat every firearm as if it is loaded; muzzle in a safe direction at all times
- Verify your revolver is rated for standard-pressure 45 Colt before chambering this load
- This product contains lead — wash hands after handling and comply with California Proposition 65 if applicable in your jurisdiction
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