I have a DD upper 14.5" carbine length obviously marked 5.56 nato and i am trying to determine why im getting slight case spliting when i shoot hornady steel match 75gr. Once in a while (every 250 rounds or so) ill get a stuck case sometimes have to smack it out with a cleaning rod. My other guns shoot this ammo fine amd it seems reletively hot for .223. Im running a standard H buffer and Auto carrier with the correct extractor insert and spring and O-ring.
Any ideas? Or should i ditch the steel match?
I hate to ditch it considerig i have 1200 rounds left and its perfect training ammo for my regular .223 TAP 75gr.
Thanks for any help.
Also where can you get guages to check 5.56 vs .223?
(Not a chamber reamer)