I have 3 AR 15s and have recently run into a problem about 1/3 of my reloads will not chamber the last 1/8 inch or so thus the bolt will not lock up so I can fire the round-other then hand chambering each and every round to get a reliable loaded magazine full of bullets to fire I am at a total loss to correct the problem.I have replaced dies/RCBS/Lyman/Hornady same problems I used a dillion square deal B/and have even went back to my old reliable an RCBS rock chucker.Is there anyaway I can check these rounds/if so how/if it is another piece of equipment who makes it/how to get in touch ect. Thanks