Remington Core-Lokt ammunition in .338 Remington Ultra Magnum (brand part no. 27942) loads a 250-grain pointed soft point bullet, the original controlled-expansion design that has been hunting’s first choice for more than 75 years. Since 1939, more hunters have relied on Core-Lokt than any other big-game ammunition, filling more tags on more continents than any other load in history. The tapered copper jacket is mechanically locked to a solid lead core, delivering massive 2X expansion, strong weight retention, and consistent on-game results shot after shot. For .338 RUM hunters who want that proven, best-selling performance behind serious magnum velocity, this rifle ammunition is built for the hunt.

Key Specifications

• The chambering is .338 Remington Ultra Magnum, a big-bore magnum built for the biggest North American game.
• The bullet weighs 250 grains, a heavy weight matched to the cartridge’s magnum case capacity.
• The bullet type is Core-Lokt Pointed Soft Point, Remington’s original controlled-expansion design.
• The tapered copper jacket is mechanically locked to the lead core, preventing separation on impact.
• That locked construction delivers 2X expansion and strong weight retention for consistent on-game results.
• Listed muzzle velocity is 2,860 fps, generating significant energy downrange.
• The case material is brass, giving reliable extraction and standard reloading compatibility.
• Cost runs about $5.41 per round, in line with premium controlled-expansion magnum ammunition.
• Each box holds 20 rounds, enough to confirm zero and still hunt the season.
• Shipping weight per box runs 2.0 pounds, useful for hunters planning a case-quantity order.

Frequently Asked Questions

How does Core-Lokt control expansion? The copper jacket is mechanically locked to the lead core, so the bullet expands aggressively without the jacket separating from the core.

How long has Core-Lokt been in production? Remington has produced Core-Lokt since 1939, and it remains the best-selling hunting ammunition of all time.

Buy Remington Core-Lokt .338 RUM 250gr PSP

Three-quarters of a century of hunters have trusted Core-Lokt to put game down, and .338 RUM gives it serious magnum authority. Order from our Lubbock, Texas gun shop and it ships fast to your door.