I don't know what alloy Weaver uses for their bases, but it is pretty hard/stiff/rigid, such that I doubt that you could install a set of rings and crush or distort an alloy Weaver base, at least before you stripped the threads in the cross-screw. I typically recut the slots in the Weaver alloy bases that I use, just to insure that they are uniform and if the slots aren't cut where I want them on the 1-piece style. I like the 1-piece Weaver bases on my Marlin 336, Savage 24V, and Winchester 88 & 100 rifles because if I use QD rings, I can swap the scope for a Lyman or Redfield receiver sight as an auxiliary sight and see the front sight through the trough of the Weaver base.
On most of my rifles, I use Warne bases, but on those rifles where Warne doesn't offer a base option, I haven't had a bit of trouble using Weaver alloy bases in their place.
Jeff
