Federal Fusion 300 Winchester Magnum Ammo 165 Grain Bonded Round Nose

Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.

Federal Fusion 300 Winchester Magnum ammo pairs a 165-grain bonded round nose bullet with magnum-level velocity for hunters pursuing elk, moose, and heavy-bodied mule deer. The electrochemical bonding process fuses the lead core directly to the copper jacket at the molecular level, eliminating the core-jacket separation that causes shallow wound channels and lost game. At 3080 fps muzzle velocity and 3465 ft-lbs of energy, this load delivers flat trajectory and deep penetration across hunting distances from 50 to 400 yards. Brass cases accept standard large rifle magnum primers and reload consistently through multiple cycles.

Performance at a Glance

The bonded round nose design stabilizes in flight and initiates expansion on impact without fragmenting. Federal’s tip-skiving process engineers controlled petal formation that radiates energy through vitals while the bonded core maintains 85-95% weight retention. The boat tail base reduces drag and wind drift, extending effective range in open country where magnum cartridges excel. Boxer primers ignite uniformly in sub-freezing mountain temperatures and under magnum powder columns.

This load suits bolt-action rifles with 24-inch barrels and 1:10 twist rates common in factory 300 Win Mag chamberings. The 165-grain weight balances velocity retention with recoil management in rifles weighing 8-10 pounds with scopes. Verify compatibility with your rifle’s chamber specifications and magazine length before ordering. Browse additional 300 Win Mag ammo for target shooting and long-range applications.