FA in competent hands like your groups are different. Bump fire that I have seen done many times over the years sprayed rounds all over. Many over the back stop berms. Now, the state is considering just closing the last
unsupervised Public Range in this area because of this! If you ever see some guys use bump fire to totally empty
a 30 or 40 round magazine or worse, like a 75 round drum as fast as it will fire, you will quickly see the problems.
They just shoot to empty the weapon in minimum time. There is no regulated shoots, like I know you attend with a weapon designed for FA, for this bump firing. Not the same at all LG. It is actually hurting the shooting sports, giving it a bad name in some cases. Companies that insure Club Ranges are coming down hard on bump firing. Supervised FA shoots by people like you are not the problem.