I have a new barrel for my Glock. Its a lone wolf distributors barrel. Several rounds wouldnt go into battery. They were almost there, but the slide needed just a nudge to get it closed.
Also, this was only happening with one load. They were made up with new starline brass, 200 grain solids. The COL was fine, as well as case length. I did use a very heavy crimp on these.
I also tried my other handloads using 180 grain XTP and CCI Blazers. Both those functioned just fine. Also shot some unknown stuff that worked fine too.
Maybe they are too Hot for the spring in the gun? I clocked them at 1140. But those 180's were pretty stout too doing over 1200