The 400 Legend is a high-performing straight-walled cartridge that is ideal for hunters and sport shooters. Offering high velocity and low recoil, 400 Legend is fun to shoot at the range and very effective in the field. 100% More Energy than a 12-Gauge slug at 100 yards 55% Less Recoil than a 12-Gauge slug Energy Equivalent to 450 Bushmaster with 20% Less Recoil Over 20% More Energy than a 30-30 WIN and 25% More Energy than 350 Legend, with Greater Penetration STRAIGHT-WALLED CARTRIDGE SPECS - Bullet Diameter: 0.4005 inch | Shellcase Length: 1.650 inches Mfg: Winchester