I want to thank everybody for the info. I think I just need to follow through more on my trigger pull. It is a semi auto. I don't know the manufacturer.
As far as the site plain, maybe the stock is too short? I do have to really cheek down on it to line up the sites, very awkward for me. The other guy had the same site problem. A day or so later, he told me, his cheek felt like somebody punched him, from the recoil.
I'm 65, grew up with revolvers and bolt action rifles.