Yes, for several coons ages the Weaver bases and rings have been used, and for a lot of that time were actually the standard, that other mounts were judged by. I've used them for a long time and never had any problem.
In 1965 I bought a Sako in 270, complete with the Sako rings, which I thought was a dream set up. The heavy rings dovetailed into solid, tapered mounts on the rifle.
Only one trouble, I could not hold the scope in the rings, which had only one screw in each end. The scope kept slipping, until I gave up. Weaver made bases that fit the Sako dovetail. Got those and Weaver rings and the scope never moved again.
When scopes became popular, after World War Two, it was the very low power units that sold well. The Weaver K2.5 soon ruled the roost in that department. Jack O'Connor had his jocular moments in print and here is what he said about the K2.5 when it came out. "If you want to shoot black cats at midnight in a coal mine, the Weaver K2.5 is your scope!"
Never tried that. However, the 2½ power Weaver adorned some mighty fancy rifles on major hunting safaris in the almost unknown northern BC mountains.
Then Lyman came along with their much hyped and better quality 2½ power, the first Lyman Alaskan. It became King of the Hill with the well heeled hunters going to Alaska, at least, as well as northern BC.
Oh, the grand old times of the glory days of hunting and shooting!
Gee, I forgot, were you asking if a low power scope was OK for a 30-30?