I received the box on a somewhat timely basis given I ordered it over a holiday weekend. Despite the description "Ammo Inc 223 Rem Ammunition 55 Grain Full Metal Jacket Can 200 Rounds" - which did not include the word "reman" - I'm a little surprised that the ammo is a mix of .223 cases and 5.56 cases (which should be the same specs, although the 5.56 rounds can be loaded at a higher pressure). I can't tell if the cases have been used before. I'm going to trust that this is all loaded as .223 for now as it wont hurt the rifle that I have which is capable of shooting both.