My point is simple. You are experiencing clipping and the cause is that the moderator bore is not in line with the barrel. You don't know that because you have no way to detect it. Hence the suggestion of using a test rod. Having a test rod is super convenient and easy to use. It should be used every time a moderator is mounted to a gun. If you own a moderator, you need a test rod. There are many ways that can skew a moderator out of barrel alignment. This misalignment thing is the primary reason moderator manufacturers use over large bore clearances, because they do not want customer complaints. These large bore clearances really hurt the silencing function. If everything was in perfect alignment, you only need a few thousands of clearance. If you doubt me, measure the moderator bore size yourself.