I recently purchased a KKM barrel for my G35, and I found that while jacketed/plated bullets dropped in fine, my Bayou Bullet loads were a little too tight. KKM said to ship back to them with some dummy rounds, and they would adjust the barrel for me. Total time for the whole process, including shipping both ways, was 7 days. And no charge for the work. Perhaps Bar-Sto will do the same for you.