Winchester 5.56 MM 55 GR. FMJ~ Lake City ~ (WM1931000)

Available in 1000 Round Case loose & 500 Rounds packaged in 50 Cal plastic LAX Ammo can 

This is Lake City production 5.56  ~ 55 gr

Please Note that LAX breaks down the 1000 round loose cases and splits the the case in half by a weight scale counter.  

Winchester also does their counts by weight in loose cases.  This occassionaly can lead to a few rounds over or less per 500 or 1000 rounds.