5.56x45mm – 55 Grain FMJ – Winchester (WM193150) – 600 Rounds

Winchester’s 150 round value pack fills five 30 round magazines exactly, which makes it a tidy unit for range days. This listing is Winchester USA M193 5.56x45mm NATO 55 grain full metal jacket ammo, MPN WM193150, sold as 600 rounds in four 150 round value packs.

Winchester rates this load at 3,180 fps with 1,306 ft-lbs of muzzle energy. M193 is the classic 55 grain military ball loading for the 5.56 NATO, and it is built to 5.56 pressure, which helps carbine-length gas systems cycle reliably. The 55 grain FMJ stabilizes in every common AR-15 twist and is accurate enough for zeroing and practice out to typical carbine distances. It is a training load, not a hunting or defensive round.

This ammunition is for rifles chambered in 5.56x45mm NATO or 223 Wylde, including AR-15 rifles from Colt, Daniel Defense, Smith and Wesson, Ruger, and Palmetto State Armory, the Ruger Mini-14 marked 5.56, the Springfield Saint, the IWI Tavor X95, and the FN SCAR 16S. A common question is whether 5.56 M193 can be fired in a 223 Remington rifle. It is not recommended, because 5.56 runs at higher pressure than 223 chambers are designed for. Another common question is how M193 differs from 223 FMJ. M193 is loaded to 5.56 NATO pressure, while 223 FMJ is loaded to lower commercial pressure, which can affect cycling in short gas systems.

Winchester WM193150 is new production ammunition, not reloads, made in the USA. It uses brass cases and is non-corrosive. This listing ships as 4 value packs of 150 rounds for a total of 600 rounds of 5.56 NATO M193. Each pack loads exactly five 30 round magazines, and buying 600 from one lot keeps your zero steady across range days. Four packs are also easy to split between two rifles or two shooters for a weekend of practice or a carbine course.