My new LMT upper does not seem to like wolf of Tula steel cased ammo. Brass show just fine. Chamber is 223/5.56 and I'm shootin 223 Tula 62 grain. It won't load the next round. The spent casings are really sticky in the chamber. I can't even put a spent casing back fully into the chamber. It will go a little more then 3/4 way in and then it's extremely tight. Is this something that will quit happening when I get more rounds through it ? It's my 1st AR and I have only put about 80 rounds thru it. Brass cycles just dandy. Thanks for all the help.