Winchester Ammo Wm855500 USA Green Tip 5.56X45mm Nato 62 Gr Full Metal Jacket (FMJ) 500 Rounds Per Box Winchester "USA White Box" stands For Consistent Performance And Outstanding Value, Offering High-Quality Ammunition To Suit a Wide Range Of hunter's And shooter's Needs. Caliber: 5.56X45mm Nato Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 62 Gr Muzzle Energy: 1289 ft Lbs Muzzle Velocity: 3060 Fps Rounds Per Box: 500 Boxes Per Case: 2 Casing Material: Brass
Manufacturer: Winchester Ammo Mfg Number: Wm855500 Model: USA Series: Green Tip
Caliber Dictionary
The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington
