The Buffalo Bore Buffalo-Barnes .300 Winchester Magnum 180-grain TSX (part no. 55B20) is a hard-hitting big-game load built by Buffalo Bore, a Montana ammunition maker known for pushing bullets harder than standard SAAMI-spec factory loads dare to go. This round pairs the .300 Win Mag’s long-range reach with a Barnes Triple-Shock X bullet, a lead-free copper design engineered to retain nearly all of its weight through deep penetration. It’s a serious choice for elk, moose, and other tough North American game where a bullet that holds together matters more than raw velocity. Hunters who demand consistency from every case will appreciate the attention Buffalo Bore puts into each load.

Key Specifications

• Chambered in .300 Winchester Magnum, a flat-shooting magnum cartridge with the reach for long-range elk and moose hunting.
• Loaded with a 180-grain bullet that balances velocity and weight retention for deep penetration on heavy game.
• Built around the Barnes TSX (Triple-Shock X) bullet, an all-copper, lead-free design that expands into a controlled mushroom rather than fragmenting.
• Cases are brass, giving reloaders a strong, reusable case for handloading once the factory rounds are fired.
• Sold in boxes of 20 rounds, a practical count for sighting in and a hunting season without buying loose ammo.
• Packed 12 boxes to a case, making it easy for guides, outfitters, or serious hunters to stock up in bulk.
• Runs about $3.90 per round at full retail, in line with premium lead-free hunting ammunition.

Frequently Asked Questions

Is the Buffalo-Barnes 180gr TSX lead-free? Yes, the Barnes TSX bullet is a solid-copper design with no lead core, meeting hunting regulations in lead-restricted areas.

What game is this .300 Win Mag load suited for? The 180-grain TSX’s deep, controlled penetration makes it a strong choice for elk, moose, and other large North American game.

How many rounds come in a box? Each box holds 20 rounds, with 12 boxes per case for hunters and guides who want to stock up.

Buy the Buffalo Bore Buffalo-Barnes .300 Win Mag 180gr TSX Ammo

A big-game rifle deserves a load that won’t quit on impact, and this Buffalo-Barnes build is engineered for exactly that job. Round out your rifle ammunition supply before the season starts. Order from our Lubbock, Texas gun shop and it ships fast to your door.