Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, lifelong hunter.
For big-game hunters running lever-action rifles chambered in Remington Core-Lokt 45-70 Government ammo, the 405-grain jacketed soft point remains the benchmark load that’s filled more tags than any other cartridge since 1939. This is 45-70 Government ammunition engineered for controlled expansion: the tapered copper jacket locks mechanically to a solid lead core, expanding to roughly twice its original diameter while retaining mass for deep wound channels through heavy bone and dense muscle on elk, moose, black bear, and brown bear at woods distances.
Built for the Box
Each 405-grain JSP exits the muzzle at 1600 feet per second, delivering 2302 foot-pounds of energy—ballistics that mirror the original black-powder 45-70 trajectory while operating at modern smokeless pressures safe for Marlin 1895, Henry Big Boy, and similar actions. The 0.281 G1 ballistic coefficient keeps the heavy bullet supersonic through 200 yards, and the boxer-primed brass case reloads cleanly for shooters who work up custom loads. The lead core is not California-compliant; verify local regulations before ordering.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 45-70 Government |
| Bullet weight | 405 grains |
| Bullet type | Jacketed soft point (Core-Lokt) |
| Muzzle velocity | 1600 fps |
| Muzzle energy | 2302 ft-lbs |
| Ballistic coefficient (G1) | 0.281 |
| Rounds per box | 20 |
| Case | Brass |
| Primer | Boxer (reloadable) |
| Corrosive | No |
| Lead-free | No |
| Intended use | Hunting |
| Manufacturer | Remington |
This load ships as DOT-regulated hazmat freight. Store boxes in a cool, dry location away from primers and powder—California Prop 65 notice applies due to lead content. Verify that your rifle’s action is rated for modern smokeless 45-70 pressures before firing; some vintage trapdoor Springfields require lower-pressure cowboy loads. For current availability and bulk pricing on 45-70 ammo, check our category landing page.
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 universal rules: treat every firearm as loaded, never point at anything you are not willing to destroy, keep your finger off the trigger until ready to fire, and be certain of your target and what lies beyond it.
- Verify chamber pressure compatibility with your rifle’s action before firing modern smokeless 45-70 loads in vintage or replica firearms.
- California Prop 65 warning: this ammunition contains lead, a chemical known to the State of California to cause cancer and reproductive harm.
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