The .350 Legend, also called 350 LGND (9×43mmRB), is a SAAMI-standardized[2] straight-walled intermediate rifle cartridge developed by Winchester Repeating Arms.

[1][4] At the 2019 SHOT Show in Las Vegas, Nevada, the .350 Legend cartridge was introduced by Winchester Ammunition.

[8] The cartridge was developed to deliver enough energy to achieve lethal terminal effects on large deer out to 200 yd (180 m).

The .350 Legend cartridge is designed to cycle in a variety of firearm platforms, and has been shown to operate in bolt-action rifles like the Winchester XPR.

The .350 Legend case is a new design that maximizes terminal performance while optimizing the ability to extract the cartridge from the chambers of a variety of firearms.

Winchester engineered .350 Legend hunting projectiles (such as the Extreme Point and Power-Point bullets) for use on big game out to 250 yd (230 m).

A growing number of states that previously restricted deer hunting to limited-range slug guns or muzzleloading firearms are now allowing rifles chambered in straight-walled centerfire cartridges.

Ohio's Deer Hunting Regulations allow the use of a straight-walled rifle cartridge with a minimum caliber of .357 inches (9.1 mm).