So I did a search and couldn't find anything. If I'm posting this in the wrong place I apologize. I have a 5.56 mag for my M4...and I have 40 rounds of bullets in boxes...of 5.56. I drag it over the magazine...hit load ammo...and it says wrong ammo type. Am I doing something wrong? It's 5.56...it should fit in a 5.56 mag right? Thanks in advance.