That was a good BASIC guide to mounting a scope, but in Step 4, he leaves out a CRITICAL point!Zardiw: Sir; Welcome from NC
anytime I find myself stuck; problem solving!
Start at scratch. Assume nothing
When tightening the screws on the ring tops, you need to take care to tighten them in an alternating, crisscross pattern, that keeps the ring tops evenly depressed from side to side, i.e. the small gaps between the lower and upper ring halves needs to stay equal. Otherwise the scope tube will be twisted in place, and/or canted by the time the tightening process is complete.
It is also VERY handy to use a small "inch/pound" torque wrench for tightening the ring screws to even pressures. (I use the Wheeler Fat Wrench)
I have mounted dozens of rifle scopes over the years, for myself and my friends. It is not a complicated process, but it IS a very PRECISE process that takes care and detail attention to get the best results.