I have a BA30 that I am using on my AI AE with a 20" barrel. With the suppressor attached, it is shooting .5 mil high at 100 yards. It is repeatable, and tightens the groups, so I'm happy the performance. However, I've never had a suppressor that causes the groupings to rise. All others have caused a downward shift. What could be causing it to rise so drastically? Barral harmonics? Thanks!