Just got a new 9mm conversion barrel for my Glock 22. I cleaned it inside and out, installed it and shot 25 rounds through it. It shot ok, POI was a bit high but it did good for the brief test. Inspection after 25 rounds showed what looks like a build up at the beginning of the lands. BUT, It is all on one side of each land. As if the lead in was cut after the rifling and burs were left on each land, all on the side a clockwise cutter would leave. So, I’m not sure steel barrel material will just shoot out over time. It definitely will not brush out. I’m leaning towards sending it back. Thoughts?