Iv'e had a nef 20 ga. for 9 years. never had a problem with it. shot great, and killed a lot of grouse. My brother gave it to me one christmas. he had owned it for several years prior to that. He bought it used from a gun shop! Thease are my favorite shotguns by far. I recently upgraded to a 12 ga., but it groups the shot about 1 1/2 - 2 feet low when the brass bead appears to be resting on the barrel, not being able to see any of the length of the barrel. This is how ive always shot bead sight guns. can I alter this sight to group higher?