Tom523

I solved the problem! I shaved off 2 thousandths off the bottom of the die and reloaded 20. Every one of them cycled through all 4 AR 15's. Thanks guys I appreciate the knowledge that you imparted on me. I see I'm gonna have to invest in some more equipment.

Thanks, for the photos. I ran into that problem too. I think I have it corrected though.

I have turned down the sizing die until I can barely slide a piece of paper between the bottom of the die and the shell holder.

I haven't checked the cases with a case gage. I don't have one. The all 4 uppers are 5.56 uppers. The COAL is 1.746 in.

I haven't checked the cases with a case gage. I don't have one. The all 4 uppers are 5.56 uppers. The COAL is 1.746 in.

My self and a buddy of mine have started to reload .223 for our Ar 15's. We bought the once fired 5.56 brass and projectiles from an ad in Shot Gun News. We both have the same problem. The brass after resizing will not go into the chamber far enough for the bolt to lock in. I've trimmed the cases with a Lee trimmer and pilot. I've sized mine with hornady full length die and tried the RCBS small based die set. Factory .223 rounds will cycle through all four of our guns but the reloads will sometimes lock in with forward assist but most will not at all. This problem is driving us crazy. My buddy says that the bolt face needs to be shaved a couple thousandth of an inch or the locking lugs shaved . Has anyone else had this problem? What can we do?