5.56x45mm – 62 Grain M855 FMJ – Winchester (WM855200) – 800 Rounds

M855 green tip is the 62 grain military pattern load that many AR-15 owners keep on hand for training and reserve. This listing is Winchester USA M855 5.56x45mm NATO 62 grain green tip full metal jacket ammo, MPN WM855200, sold as 800 rounds in four 200 round packs for outdoor training and long term storage.

Winchester rates this load at 3,060 fps with 1,289 ft-lbs of muzzle energy. The M855 bullet has a steel penetrator in the nose over a lead core, inside a copper jacket, and the green tip identifies it. The heavier 62 grain bullet holds velocity a little better at distance than 55 grain M193. It is a full metal jacket training load, not a hunting bullet, and because of the steel core it is not suitable for close range steel targets.

This ammunition fits rifles chambered in 5.56x45mm NATO, including AR-15 rifles from Colt, FN, Daniel Defense, Smith and Wesson, and Ruger, plus the Ruger Mini-14, FN SCAR 16S, IWI Tavor X95, and SIG MCX. A common question is whether M855 is allowed at indoor ranges. Many indoor ranges and some outdoor ranges prohibit it because the steel penetrator damages backstops and steel plates, and the bullet will attract a magnet, so check before you go. Another common question concerns twist rate. A 1:7 twist is ideal for M855, and 1:9 barrels usually stabilize it as well. Slow 1:12 barrels generally will not.

Winchester WM855200 is new production ammunition, not reloads, made in the USA. It uses reloadable boxer-primed brass cases and is non-corrosive. This listing ships as 4 packs of 200 rounds for 800 total from one lot, a practical size for a carbine course or a well stocked range bag with consistent performance throughout. The 200 round packs also divide neatly between shooters or between a training stock and a reserve that stays sealed until it is needed.