Well...
The issue is settled, for now at least... I was in town this morning and found an older Sheridan blue streak for $50...
A local shopkeeper had taken it in trade from an older guy who couldn't pump it anymore... The old guy took home a gamo .177...
The Sheridan is obviously well used and has some considerable wear on it. But I made a 1" circle on some cardboard and put 2 of 5 shots in the top of it from 50'. all shots grouped within 1", fired from my lawn chair offhand...
