Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Underwood’s 45 Colt 220gr Lehigh Maximum Expansion load sits at the intersection of barrier-blind penetration and controlled terminal expansion. This is 45 Colt 220 grain ammo engineered for hunters who need clean pass-throughs on medium game without lead fouling — solid copper construction means no jacket separation, and the Lehigh Maximum Expansion hollow point expands hydraulically on tissue while staying intact through bone, drywall, and sheet metal. You’re looking at 900 fps from a revolver barrel, 396 ft-lbs at the muzzle, and nickel-plated brass cases that feed and extract cleanly in Judge, Governor, BFR, and 460 S&W cylinders.
Performance at a Glance
Lehigh Defense designs its Maximum Expansion projectiles to create wound channels through radial petal deployment — the nose cavity opens on hydrostatic pressure, not hard contact, so you get full expansion in tissue and straight-line penetration through intermediate barriers. Underwood loads these 220-grain solids to deliver hunting-grade energy from short-barrel revolvers, and the nickel plating resists corrosion in humid carry environments. Flash-suppressed powder keeps your night vision intact if you’re working hogs after dark or defending camp in low light.
| Spec | Value |
|---|---|
| Caliber | 45 Colt (Long Colt) |
| Bullet weight | 220 grains |
| Bullet type | Solid Hollow Point (Lehigh Maximum Expansion) |
| Muzzle velocity | 900 fps |
| Muzzle energy | 396 ft-lbs |
| Rounds/box | 20 |
| Case | Nickel plated brass |
| Primer | Boxer |
| Corrosive | No |
| Lead-free | Yes |
| Intended use | Hunting |
| Manufacturer | Underwood Ammunition |
This load runs in Taurus Judge, Smith & Wesson Governor, Magnum Research BFR, and 460 S&W revolvers — projectile length makes it incompatible with Bond Arms derringers. Shop more hunting-grade revolver loads in our 45 Long Colt ammo category.
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 firearms safety at all times
- Verify current ammunition laws in your state and locality before purchasing
- This ammunition contains copper — handle with care and store in original packaging until use
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