Part of the trouble with our older scope mounting systems is that they were designed way back when scope reticles were not permanently centered. If you cranked the crosshairs up and right, they traveled up into the upper right quadrant of your field of view and there they sat. So rather than adjusting the crosshairs, shooters would center them and then adjust the scope itself up, down, right or left. This was an immense pain in the ass, and once you had a scope mounted, you didn’t touch it.
Now we don’t have to do this, unless the barrel is out of line with the receiver, and then you will probably need a mounting system with some of the old left/right to it.
The strongest mount around is made by David Miller, the great Tucson rifle builder. He builds each one to fit a particular rifle, and they are constructed so that the scope is almost entirely encased by the steel rings and bases.
The lightest/simplest rings and bases are made by Talley, and were designed by Melvin Forbes of New Ultra light arms. The base and lower half of each ring is one piece of aircraft aluminum. They weigh less than a hummingbird’s spleen, but are extremely strong.
The strongest bases and rings, aside from David Miller’s, are the standard Talleys. They are steel, and have a virtual death grip on the fine-gun biz. Every expensive rifle you see employs them. However, getting them mounted can cause you to say many a bad word, and the directions don’t help much.
The worst rings and bases are any of the see-unders. Structurally they are weak and they force you to lift your head off the stock to see through the scope and thereby violate one of the principles of sound rifle shooting. And try to get a gun with these abominations on board into a saddle scabbard.