The Federal Barnes TSX .300 WSM 165gr load (brand part no. P300WSMG) pairs a 165-grain Barnes Triple-Shock X bullet with the .300 Winchester Short Magnum cartridge. Federal lists it at 3130 feet per second at the muzzle, and the TSX is a one-piece copper hollow point that groups tightly at long range. Its monolithic design retains almost 100 percent of its weight on impact for deep penetration, while the deep hollow-point tip opens into large, consistent expansion. A grooved shank improves accuracy by cutting barrel fouling. It is a natural fit for big game hunters working long shots in open country.

Key Specifications

• The cartridge is the .300 Winchester Short Magnum, a short-action magnum built for long-range big game.
• Bullet weight is 165 grains, a versatile weight for deer-sized and larger game.
• The bullet is the Barnes Triple-Shock X (TSX), a one-piece copper hollow point.
• Muzzle velocity is listed at 3130 feet per second, which flattens the trajectory for longer shots.
• Muzzle energy is 3589 foot-pounds on Federal’s published ballistics table, a measure of the energy available at the start of the flight.
• The ballistic coefficient is .398, which describes how well the bullet holds speed against drag.
• Bullet length is 1.301 inches, a physical dimension that matters for magazine fit and stabilization.
• Weight retention is almost 100 percent on impact, which drives deep penetration through bone and muscle.
• A grooved bullet shank improves accuracy and minimizes barrel fouling.
• Each box holds 20 rounds, enough to confirm your zero and still hunt the season.

Frequently Asked Questions

Is the Barnes TSX bullet made of lead or copper? The TSX is an all-copper, one-piece bullet. Federal describes it as a proven all-copper hollow point with a monolithic design.

Does this purchase support conservation? Yes. Federal states that a portion of the proceeds of each sale of this product goes directly to the conservation effort of the Rocky Mountain Elk Foundation (RMEF).

What hunting is this load built for? Federal lists the usage as big game and long range, which places it with long-range big game hunting.

Buy the Federal Barnes TSX .300 Winchester Short Magnum 165gr Rifle Ammunition, 20-Round Box

The Triple-Shock X was engineered for deep, reliable penetration, and the short-action .300 WSM gives it the speed to use that design at distance. Browse more rifle ammunition and order from our Lubbock, Texas gun shop for fast, insured shipping to your door.