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The Remington Core-Lokt .300 WSM is a workhorse round for hunters who want dependable terminal performance without the premium price tag. The 150-grain Pointed Soft Point bullet cuts through the air with a muzzle velocity of 3320 feet per second and delivers 3671 foot-pounds of energy at the muzzle. That speed translates to a flatter trajectory than heavier bullet options, making it particularly effective for deer and pronghorn hunting where you might want extra velocity to minimize holdover on longer shots.
The mechanical lock design is the real story here. Remington's tapered copper jacket is locked directly to the solid lead core, which prevents jacket-and-core separation under impact stress. This means the bullet expands in a controlled way, delivering roughly twice the original diameter of expansion. That controlled mushroom shape maximizes energy transfer while maintaining weight retention, typically delivering 65 to 80 percent of the original bullet weight downrange. This balanced performance is why Core-Lokt has become the standard for budget-conscious hunters who refuse to compromise on results.
The .300 Winchester Short Magnum is a compact powerhouse, and this 150-grain load takes full advantage of that case. The PSP (Pointed Soft Point) profile flies flatter than traditional soft points, so your holdover adjustments stay smaller out to reasonable hunting distances. At 500 yards, a 150-grain .300 WSM still carries around 1636 foot-pounds of energy, plenty for a well-placed shot on medium-sized game. Factory ammunition comes in reloadable brass cases with non-corrosive Boxer primers, so you can reload these and stretch your dollar even further.
Each box contains 20 rounds of new production ammunition. This is a classic green-box Remington load that's been proven in the field for generations, and it remains one of the most popular big-game cartridges in North America for hunters who want results over flash.
The 150-grain Core-Lokt can work on elk with proper shot placement at reasonable distances, typically inside 300-350 yards. Many hunters prefer heavier bullets like 180 grains for elk because they penetrate deeper and retain more energy at distance. The key is using a well-constructed bullet with that speed, which the Core-Lokt provides through its locking mechanism and weight retention.
The flat-shooting design and retained velocity make the 150-grain Core-Lokt effective to around 400-500 yards on deer and pronghorn. The .300 WSM maintains over 1600 foot-pounds of energy at 500 yards, which is adequate for medium-sized game. Beyond that distance, bullet drop and wind drift become harder to judge without advanced ballistics tools, so practical range depends on your individual shooting skill.
Yes. Remington loads this ammunition in reloadable brass cases with non-corrosive Boxer primers, which are designed to be reloaded. You can push your cost per shot even lower by recasing and reloading the empties, making Core-Lokt an even more economical choice for frequent range shooters.
The Core-Lokt uses a tapered copper jacket mechanically locked to a lead core, which resists separation on impact. This design promotes consistent 2X expansion while retaining 65-80 percent of the original bullet weight. That balanced expansion creates a controlled mushroom shape that maximizes energy transfer and penetration while maintaining structural integrity, resulting in reliable on-game performance hunters have trusted for over 75 years.
| Bullet Weight (Grains) | 150 |
|---|---|
| Caliber/Gauge | .300 Winchester Short Magnum (WSM) |
| Case Material | Brass |
| Cost per Round | 2.80 |
| Grains | 150 gr |
| Length | 8.3500 |
| Manufacturer | |
| Manufacturer Part Number | 29489 |
| Shipping Weight | 1.55 |
| Units per Box | 20 |
| UPC | 047700385303 |
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