About the scope I don't know, never used one. You have everything esle right , seat firmly and expect it will be a bit eratic till you get it broke in, the fast way to break it in with bullets would be to get some FPB and shoot them.
After you have it broke in then try from 90 to 120 gr one of these loads will normally shoot much better than the others all though there are a few guns around that do well with all of them. Lee