Hello the highroad please help me. I am attempting to load 5.56 American Eagle brass that has been once fired through a DPMS AR 15. I'm using a RCBS 223 Die Set and here is the problem. The brass is not re sizing correct. The bullets case mouth is to big? There is not enough tension on the case to seat the bullet properly I can just pull the bullet off? Make sense? I resized and de primerd and am lost. I'm trying to load Seirra 65 grain 224. With benchmark 23.5 powder, nice groups at 100 Please help. Shouldn't the 223 dies resize the brass correct? I don't understand.