.300 Win Mag Ammo for Sale | Hunting & Long Range Rifle Ammunition

.300 Win Mag Ammo

The .300 Winchester Magnum is one of the most versatile and widely used long-range cartridges in the world, equally at home on big game at 400 yards as it is on steel at 1,000. It pushes 150–220 grain bullets to high velocity from a standard long-action bolt gun, with a flat trajectory and enough energy to take any North American game cleanly. Nearly every major manufacturer loads .300 Win Mag, making it one of the easiest magnum cartridges to find and one of the best-supported for handloaders.

Read our full .300 Win Mag Ammunition Buying Guide ↓

Ballistics Overview

A 180-grain .300 Win Mag load typically leaves the muzzle at 2,950–3,000 fps with over 3,500 ft-lbs of energy—significantly more than .308 Winchester with the same bullet weight. A 165-grain load approaches 3,100 fps, making it one of the flattest-shooting big-game cartridges in common use. At 500 yards, most quality .300 Win Mag loads still carry over 2,000 ft-lbs of energy—enough for elk and moose cleanly. The additional velocity also extends point-blank range and reduces wind drift at distance.

Hunting vs. Match-Grade

For hunting, look for controlled-expansion bullets like Nosler Partition, Federal Trophy Bonded, Hornady CX, or Swift Scirocco in the 150–200 grain range. These bullets are designed to expand reliably at .300’s high velocities without coming apart on bone. For long-range target shooting and competition, match-grade loads with high-BC bullets like the Hornady ELD-M or Berger Hybrid Tactical deliver the consistency needed for precision work past 600 yards. Hunting and match loads serve different purposes and shouldn’t be interchanged.

Common Platform Pairings

The .300 Win Mag is available in nearly every major bolt-action platform: Remington 700, Winchester Model 70, Bergara B-14, Weatherby Vanguard, Tikka T3x, and Christensen Arms Mesa, among others. It uses a standard long action, so most .308-length bolt guns can be re-barreled for it. The cartridge is also available in semi-automatic platforms like the Browning BAR. Most .300 Win Mag rifles use a 24–26 inch barrel to take full advantage of the velocity potential.

Recoil and Shooting

The .300 Win Mag produces more felt recoil than .308 Winchester—roughly 20–25 ft-lbs of recoil energy in a 9-pound rifle, versus 15–18 for the .308. This is manageable for most shooters with a quality recoil pad and proper technique, but enough to make extended range sessions more tiring than lighter calibers. A muzzle brake reduces felt recoil by 40–50% and is worth considering if you’re recoil-sensitive or planning high-volume training. Most hunting rifles in .300 Win Mag are available brake-threaded from the factory.

Pricing and Selection

The .300 Win Mag is mid-tier in rifle caliber pricing—more expensive than .308 but less than the true magnums like .338 Lapua. Expect $2–$4 per round for hunting loads and $3–$6 for quality match-grade. Federal, Hornady, Remington, and Nosler all produce excellent .300 Win Mag loads in multiple configurations. We stock a rotating selection of all major load types; check current inventory for specific bullet weights and brands.

If you’re shopping for a .300 Win Mag rifle, browse our Bergara and Weatherby pages for two of the best-value long-range bolt guns in the caliber. See our full ammunition page for other calibers, or visit our rifles page to compare platforms.