Underwood Ammo InterLock Features The Underwood Ammo InterLock load in .45-70 Gov is built around a 300 grain Jacketed Hollow Point bullet designed to expand reliably on impact for rapid energy transfer. Rated +P this load pushes the heavy bullet to 2350 fps at the muzzle generating 3678 ft lbs of muzzle energy well beyond standard pressure .45-70 loads. That combination of velocity and bullet weight makes it a serious choice for medium to large game where penetration and knockdown power matter most. The nickel-plated brass casing resists corrosion and feeds smoothly through lever action and single shot rifles alike. Each box ships with 20 rounds giving hunters enough ammunition for a hunt or range session without excess bulk. The 0.197 ballistic coefficient and 0.204 sectional density reflect a bullet profile tuned for controlled expansion and deep penetration on tough-skinned game. Because this is a +P rated load shooters should confirm their rifle is rated for the increased pressure before firing. Underwood Ammo built this InterLock .45-70 load for hunters who need a hard-hitting option available for sale at GrabAGun. Underwood Ammo InterLock Specifications Manufacturer: Underwood Ammo Model: InterLock Caliber: .45-70 Gov Bullet Type: Jacketed Hollow Point Bullet Weight: 300 gr Rounds Per Box: 20 Casing Material: Nickel-Plated Brass Muzzle Velocity: 2350 fps Muzzle Energy: 3678 ft lbs Ballistic Coefficient: 0.197 Sectional Density: 0.204 Rating: +P Application: Medium-Large Game Available At: GrabAGun