Hello. I have a Savage 16 gage hump back shotgun that I purchased used. I can not find a model number on it anywhere, it just says Savage automatic. I have cleaned it, and checked the ring placements and they appear to be correct, but it has problems ejecting shells. Is anyone with a Savage 16 gage hump back shotgun having problems with it ejecting properly? Did Savage make shotguns without model numbers? Thanks