I am sure there might be tens or hundreds of thousands of hunting rifles in use in Canada with aluminum Weaver or Parker Hale bases. Might help you to decide to know the real common Weaver rings were an aluminum bottom part with a steel strap over the top. There might be a modern reason to pick one over the other, but for sure, aluminum Weaver bases appear to have worked fine since at least the 1950's. They have, or had, torque specs, like most threaded things - not so sure how often those specs were respected - likely one source of difficulties - a "bit extra" is not often a good thing ...
About 25 years ago I started to put a drop of Blue Threadlocker (Loctite) into the scope base attaching threads, and then use an inch-pound torque wrench to snug up the base screws to the rifle. Then ring cap screws are always torqued to spec - but dry - never any locker there. Currently, I prefer to "chase" the female threads with a tap, first - even on a store bought new rifle or new rings - the odd one has a bit of "stuff" in there. I have had a number of "whoopsies" over the years, but never one that I could blame on a scope base or scope ring getting loose.
