Ideal for range shooting, the Winchester Ammo Lake City Brown Box FS 5.56 NATO 55 Grain FMJ ammunition is a dependable choice for outdoor enthusiasts and shooting hobbyists. Engineered to deliver impressive performance, these rounds feature a Full Metal Jacket (FMJ) bullet, a brass case, and a boxer primer, achieving a potent muzzle energy of 1306 foot-pounds and a rapid muzzle velocity of 3270 feet per second. With the added perk of being reloadable, they present a great option for those who take their practice seriously.