The.350 Legend, also called 350 LGND, is a SAAMI-approved straight-walled hunting cartridge developed by Winchester Repeating Arms. The cartridge was designed for use in American states that have specific regulations for deer hunting with straight-walled centerfire cartridges. Winchester, the cartridge’s designer, claims that the.350 Legend is the fastest production straight-walled hunting cartridge in the world. Actually the 444 Marlin is faster. It is designed for deer hunting out to a maximum effective range of 250 yards. However, its poor exterior ballistics in the hands of average or youth hunters limits this range to hunting deer sized game inside 150 yards.