Underwood Ammo Xtreme Hunter Rifle Ammuntion 45-70 Govt 325Gr Sc 2275 Fps 2
The Underwood Ammo Xtreme Hunter 45-70 Government rifle ammunition pairs serious velocity with a heavy, copper bullet designed for hunting applications. Built on nickel-plated brass cases with boxer primers, these 325-grain rounds deliver 2275 feet per second muzzle velocity and 3,736 foot-pounds of energy—ballistics that favor hunters pursuing larger game or shooting from longer ranges where retained energy matters. The copper construction delivers lead-free performance without compromise, and the sectional density and ballistic coefficient are engineered for reliable bullet expansion and flight stability downrange.
Underwood's Xtreme Hunter line is known for pushing standard cartridge velocities into magnum territory, and this 45-70 load is no exception. The 325-grain weight splits the difference between traditional 300-grain deer loads and heavier bullets, making it adaptable to both thick cover and open country hunting. The nickel-plated brass resists corrosion and is fully reloadable—a practical detail for shooters working with larger capacity rifle ammunition over time. Each box contains 20 rounds.
This is an ammunition designed to function reliably in suppressed rifles if your setup supports it, and the supersonic performance ensures consistent behavior at distance. Whether you're hunting elk-country or working up reloading components, the consistent construction and lead-free composition appeal to range-conscious hunters and serious reloaders alike. Not all 45-70 ammo offers this combination of velocity and thoughtful bullet design at hunting distances.
Key Features
- 325-grain copper bullet, lead-free construction
- 2275 fps muzzle velocity, 3,736 ft-lbs muzzle energy
- Nickel-plated brass cases, boxer-primed, fully reloadable
- Non-corrosive, new production ammunition
- Engineered sectional density (0.221) and ballistic coefficient (G1: 0.23) for stable flight
- Suppressor-safe performance
- 20 rounds per box
Specifications
| Cartridge | .45-70 Government (+P) |
| Bullet Weight | 325 grains |
| Bullet Material | Copper (lead-free) |
| Bullet Diameter | 0.458" |
| Muzzle Velocity | 2275 fps |
| Muzzle Energy | 3736 ft-lbs |
| Ballistic Coefficient (G1) | 0.23 |
| Sectional Density | 0.221 |
| Case Material | Nickel-plated brass |
| Primer Type | Boxer |
| Reloadable | Yes |
| Corrosive | Non-corrosive |
| Rounds per Box | 20 |
| Manufacturer | Underwood Ammo |
Frequently Asked Questions
Is this ammunition reloadable?
Yes. The nickel-plated brass cases are boxer-primed, making them suitable for reloading once fired. This is particularly useful for 45-70 shooters who reload, since component costs can add up with centerfire rifle ammunition.
Will this work in a suppressed rifle?
Yes, this ammunition is rated safe for use in suppressors. The 2275 fps velocity is supersonic, so you'll hear the crack of the bullet passing downrange, but the ammunition functions reliably in suppressed setups.
What kind of hunting is this ammunition designed for?
The Xtreme Hunter line is engineered for hunting applications. The 325-grain copper bullet and elevated velocity (45-70 +P spec) make it suitable for hunters pursuing larger game where energy retention and bullet performance at distance are priorities.
Does this ammunition contain lead?
No. The bullet is constructed from copper, making this a lead-free option for hunters and shooters in areas with lead ammunition restrictions.

