Remington Premier CuT 300 Winchester Magnum Ammo 180 Grain Polymer Tip Lead Free Box of 20

Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.

For elk, moose, and bear hunters working western timber or alpine ridges, the Remington Premier CuT 300 Winchester Magnum ammunition brings 180 grains of monolithic copper alloy to the field — a lead-free hunting load that preserves 95% of projectile weight through bone and hide while meeting environmental compliance standards in California and other restricted jurisdictions. 300 Winchester Magnum copper ammo in this configuration pushes 2960 fps at the muzzle, generating 3502 foot-pounds of energy for decisive terminal effect on animals weighing 400 to 1200 pounds. The polymer tip initiates controlled expansion on impact, and precision-machined grooves reduce bearing surface to keep barrel friction low while maintaining accuracy at ranges beyond 400 yards.

Load Profile

Remington sources this cartridge with brass cases and Boxer primers, making it reloadable for hunters who track lot-to-lot consistency across multiple seasons. The 180-grain copper alloy bullet retains momentum through shoulder blades and heavy muscle groups better than fragmenting lead-core designs, which matters when quartering shots are your only option on a climbing bull or a bear moving through deadfall. Muzzle velocity of 2960 fps keeps the bullet supersonic past 800 yards in standard atmosphere, and the tipped nose geometry holds a ballistic coefficient that competes with match-grade projectiles — flat enough to dial holds in 25-yard increments instead of 50.

This load cycles reliably through bolt-action rifles with standard-length magazines and feeds cleanly in semi-automatic platforms like the AR-10 and SCAR 17 chambered in .300 Win Mag. Copper fouling builds at a slower rate than jacket material from conventional hunting bullets, so bore maintenance intervals stretch when you’re shooting 40 or 60 rounds in a weekend zeroing session or practicing field positions. Browse the full 300 Win Mag ammo catalog for additional bullet weights and constructions that match your rifle’s twist rate and hunting application.

Who It’s For

Hunters operating in California condor zones, Arizona lead-free units, and other jurisdictions where non-lead ammunition is mandated by statute will find this load compliant without sacrificing the energy and penetration you need on Roosevelt elk or brown bear. The 95% weight retention figure holds across velocities from 1800 to 3000 fps, so whether you’re launching at 100 yards from a treestand or 450 yards across a canyon, the bullet arrives intact and mushrooms predictably. Handloaders who want to study copper bullet performance before committing to bulk component purchases can shoot a box of Premier CuT to measure pressure signs, velocity consistency, and terminal effect on game, then replicate the data with Barnes TSX, Nosler E-Tip, or Hornady GMX projectiles seated to similar OAL.