Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
The Remington Core-Lokt 450 Bushmaster 300 grain Jacketed Soft Point delivers controlled expansion and weight retention for deer-sized game in straight-wall cartridge zones. Introduced in 1939, the Core-Lokt design locks a tapered copper jacket to a solid lead core, preventing separation on bone contact and ensuring deep wound channels. This 450 Bushmaster ammo launches a 300 grain bullet at 2150 fps, generating 2668 ft-lbs at the muzzle — sufficient energy for whitetail, hogs, and black bear inside 200 yards.
Load Profile
The 300 grain JSP uses Boxer-primed brass cases and a lead core that expands to approximately twice its original diameter on impact. The G1 ballistic coefficient of 0.185 reflects the bullet’s blunt profile, optimized for terminal performance rather than long-range flight. Remington manufactures this load in the United States with non-corrosive primers and reloadable brass. The jacket remains bonded through hide, muscle, and bone, retaining 70-80% of original weight in gel testing and field recoveries.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 450 Bushmaster |
| Bullet weight | 300 grains |
| Bullet type | Jacketed Soft Point (Core-Lokt) |
| Muzzle velocity | 2150 fps |
| Muzzle energy | 2668 ft-lbs |
| Rounds per box | 20 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| G1 BC | 0.185 |
| Intended use | Hunting |
| Manufacturer | Remington |
This 20-round box is suitable for hunters in states requiring straight-wall cartridges for deer — Michigan, Ohio, Indiana, Iowa. The 300 grain weight and moderate velocity balance recoil with terminal energy, making it effective in AR-platform rifles and single-shot break-actions. Brass cases support handloading with standard large rifle primers and 450 Bushmaster dies.
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.
- Treat every firearm as if it is loaded. Keep the muzzle pointed in a safe direction. Keep your finger off the trigger until ready to fire. Be certain of your target and what lies beyond it.
- Verify current state and local ammunition regulations before ordering. Some jurisdictions restrict caliber, bullet type, or quantity.
- This ammunition contains lead. Wash hands after handling. Per California Prop 65, lead exposure may cause cancer and reproductive harm. See www.P65Warnings.ca.gov for details.
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