Re: Mossberg 500 rifled barrel problem?
I just re read you op and I missed something the first time I read it.. If I am reading correctly you raised the rear sight as far as you could and the gun is shooting high. The rear sight should be moved in the direction you want the gun to shoot so if your friends gun is shooting high you should lower the rear sight, not raise it. Since the sight is now all the way elevated you should lower it until your point of impact is where you want it.
When you are up to your butt in alligators, it is hard to remember your intent was to drain the swamp. Stay focused!