.300 Winchester Magnum
Serious reach and serious shove — a proven elk and long-range cartridge that punishes shooters who skip the recoil pad.
Family
Rifle
Introduced
1963
Origin
Winchester, USA
Military
MK 248 / A191 US military sniper loadings
History
Winchester introduced the .300 Win Mag in 1963, fitting near-.300 H&H performance into a standard-length action. It became the most popular .30-caliber magnum for elk, moose, and long-range work, and US military snipers adopted it for extended-range precision rifles like the M2010. It's the default answer when hunters say they want 'more than an '06.'
What it's used for
Iconic platforms
Winchester Model 70, Remington 700, the Army's M2010, and every serious bolt-action hunting line.
Common load types
Bonded and monolithic big-game loads, polymer-tip hunting loads, and heavy match bullets.
Reference only — not loading data, not ballistics advice, and KitID links to no ammunition sellers. Know your local law before you buy anything that goes bang.