The Underwood .45-70 Government +P 325gr Xtreme Hunter is a lead-free, solid copper lever-gun load from Underwood (Underwood part no. 908). The Xtreme Hunter bullet has an optimized nose flute, and its weight and velocity are tuned for maximum penetration with an unusually large permanent wound cavity. This 325-grain version leaves the muzzle at 2275 feet per second and delivers 3736 foot-pounds of energy. The load is marked +P and is built for modern firearms in good condition only, with a safety note in the FAQ below. Nickel-plated brass cases and flash-suppressed powder round it out, with 20 rounds to the box.

Key Specifications

• Chambering is .45-70 Government +P, a +P loading that Underwood builds for modern firearms in good condition only.
• Bullet weight is 325 grains, paired with a high published velocity for deep penetration.
• The bullet is the Xtreme Hunter solid monolithic copper with an optimized nose flute.
• The load is lead-free, since the bullet is solid copper.
• Bullet diameter is 0.458 inch, as published by the maker.
• Muzzle velocity is 2275 feet per second, which Underwood describes as supersonic.
• Muzzle energy is 3736 foot-pounds, the figure listed for this load.
• The G1 ballistic coefficient is 0.23, as listed by the maker.
• Cases are nickel-plated brass, which the maker says feeds well and resists tarnish.
• Each box holds 20 rounds.

Frequently Asked Questions

Can I shoot this +P load in an antique .45-70? No. Underwood states that this ammunition should not be used in antique firearms because it can damage older, weaker guns such as Trapdoor Springfields. It is made for modern firearms in good condition, and Underwood recommends it for rifles such as the CVA Scout, Marlin 1895 models made after 1972, Browning 1885 and 1886 replicas, Ruger No. 1 and No. 3, Thompson/Center Encore, and new-production Winchester 1886 rifles. If you have any doubt, have a gunsmith inspect the rifle or call Underwood.

What is the Xtreme Hunter bullet? It is a solid copper bullet with an optimized nose flute. Underwood tunes its weight and velocity for maximum penetration depth and a large permanent wound cavity, and says the solid copper body keeps barriers such as thick hide and bone from having much effect.

What velocity and energy does it deliver? Underwood lists 2275 feet per second at the muzzle and 3736 foot-pounds of muzzle energy.

Buy the Underwood .45-70 Government +P 325gr Xtreme Hunter Solid Monolithic, 20-Round Box

A lead-free 325-grain copper bullet at 2275 feet per second gives a modern .45-70 a flatter-shooting, penetration-focused alternative to the old hard cast standby. Underwood specifies modern firearms in good condition only, so check your rifle first. See more in our rifle ammunition, and we will ship from our Lubbock, Texas gun shop with fast, insured delivery.