5.56x45mm – 55 gr FMJ M193 – Winchester (SGM193KW) – 1000 Rounds

For AR-15 owners who want a full case of the classic military pattern ball load, M193 is the standard choice. This listing is Winchester 5.56x45mm NATO M193 55 grain full metal jacket ammo, MPN SGM193KW, sold as 1,000 rounds for carbine courses, match practice, and long term ammunition storage.

M193 is the 55 grain lead core ball round that served as the original standard load for the M16 family. Loaded to 5.56 NATO pressure, it produces the velocity and trajectory that AR-15 sights and optics are commonly set up for. It has a lead core rather than a steel penetrator, so many ranges that ban M855 still accept it. As a full metal jacket bullet, it does not expand reliably, so it is a practice and training load rather than a hunting round.

This ammunition fits rifles chambered in 5.56x45mm NATO and 223 Wylde, including AR-15 rifles from Colt, FN, Daniel Defense, Bravo Company, Ruger, and Smith and Wesson, as well as the Ruger Mini-14, FN SCAR 16S, HK MR556, Springfield Saint, and IWI Tavor. A common question is whether 5.56 NATO can be used in a rifle marked only 223 Remington. It is not recommended, because 5.56 runs at higher pressure and the 223 chamber has a shorter throat. Another common question is how M193 compares with M855 on steel. Lead core M193 is gentler on steel than steel core M855, but keep the minimum distance your range requires.

Winchester SGM193KW is new production ammunition, not reloads, made in the USA. It is loaded in brass cases with non-corrosive primers. This listing contains 1,000 rounds of 5.56 M193 from one lot, which keeps zero and function consistent through a long training block or a full year of practice. Stored sealed and dry, a case of brass-cased 5.56 keeps well as a reserve for your rifle.