The Federal Barnes TSX .300 Winchester Magnum 165gr (Federal part no. P300WR) is a 20-round box of .300 Winchester Magnum rifle ammunition loaded with a 165-grain Barnes Triple-Shock X (TSX) all-copper hollow point bullet. The monolithic all-copper Barnes TSX bullet has a grooved shank that Federal says minimizes barrel fouling and improves accuracy. The .300 Winchester Magnum is a long-action magnum popular for long-range big-game hunting. Federal publishes a muzzle velocity of 3,050 fps and 3,408 foot-pounds of muzzle energy for this load. It is aimed at big game and long-range shooting, and each box holds 20 rounds.

Key Specifications

• The chambering is .300 Winchester Magnum, a long-action .30-caliber magnum that needs a rifle chambered for it.
• Bullet weight is 165 grains, the weight Federal chose to balance velocity and energy in this .300 Winchester Magnum load.
• Bullet style is Barnes Triple-Shock X Bullet (TSX), the design that sets how this load expands and penetrates.
• Federal publishes a muzzle velocity of 3,050 fps, which sets the flat trajectory this load starts with.
• Published muzzle energy is 3,408 foot-pounds, the starting punch available before the bullet slows down range.
• The bullet is one-piece copper construction with a grooved shank, which Federal says improves accuracy and cuts barrel fouling.
• Federal lists a ballistic coefficient of .398, a measure of how well the bullet holds speed against drag.

Frequently Asked Questions

Can I shoot this .300 Winchester Magnum load in a .300 WSM rifle? No. The .300 Winchester Magnum and the .300 WSM are different cartridges with different case dimensions, so this load is for rifles chambered in .300 Winchester Magnum.

How many rounds come in this .300 Winchester Magnum box? The box holds 20 rounds of .300 Winchester Magnum ammunition.

Buy the Federal Barnes TSX .300 Winchester Magnum 165gr Ammunition, 20 Rounds

Ordering is simple: add the 20-round box to your cart and our Lubbock, Texas gun shop will pack it and ship it with insurance. Browse more rifle ammunition or the full Federal Ammunition lineup while you are there.