I just picked up a new SAS today. I really like the idea of it, but I had a few issues at the range. Before shooting it, I cleaned it and oiled it. The first 50 rounds were Remington UMC. I had 8 failures to return to battery. Probably the ammo combined with a new ported gun. Then I ran 50 rounds of Browning 147gr. No issues. While I was cleaning it, I noticed that the barrel has a strange ring inside of it. Is this normal on these? Accuracy.... Meh. I hope I can get used to it.