I've been using a 36 Weaver for quite a few years. Just trying to remember but think it's been on 6 or 7 rifles plus the doner I borrow it from. That's a bit of twisting just to get each one zeroed. So far so good.

They've been inching up in price lately, but it seems there's a used one on Accurateshooter.com on a pretty regular basis.