Im fairly certain you have it figured out. Like I said I didnt shoot for groups, but I saw the splash on steel right on the cross hairs every time, so something has to have changed.
Yep. That could be a big issue. Fortunately, the solution is inexpensive.
I sure hope so... When my wife got home I had the kitchen table covered with guns and cleaning items and big smile on my face (just found the swivel stud). She said "oh crap, what did you buy now?" Priceless.