I have used the Weaver pivot mount system on several rifles. It is almost as tough as the one made by Pachmyar, and that is saying something!
Currently have one holding an old Weaver 4X with post and crosshair on a 9.3X62. It works as you would hope, simple, reliable, and tough.
They return to zero properly, and shoot same size groups even when swinging the scope over and back down between shots.
They are also an easy coffee bet at the range. Try shooting a group while using the scope with it swung off to the side. I know. I know, but you will not be the one paying for the coffee and doughnuts.
It is important that you keep the tension screws relatively snug; not tight, but snug. It should take a slight effort to swing the scope through the arc in both directions. Keep the cones on those screws lightly lubricated with a premium grease. And check that from time to time. It only takes a moment.
You'll figure it out, and won't be disappointed.
Ted