I did try the open sites. No help.I did try removing the baffles to see what happens. Did not see much of a difference unless I did not get all of them out. "Two baffles and two spacers?). When I look through the breech end I can see some of the baffle on one side but not the other. I did try sliding a cleaning rod very lightly through to see if it caught a baffle but it appeared to not catch anything.I did buy an inexpensive laser, Daisy, to mount on the rail but of course the front site is in the way. The screw is extremely tight so I'm not wanting to strip the head out.