I've used classic weaver rings forever, and they have held a scope on my Win 70 in .338 win mag properly in place for around 30 years. They do suck to install, as they turn in as you tighten the screws, but once things are set up, they are lightweight and reliable.
Funny thing is, just yesterday I installed a 20 year old command-post 4X scope, using classic weaver rings on a new Savage 42 in .22 WMR over .410, that I am hoping will prove to be a "stew pot" gun while out on longer big game hunts...