Well, I'll give my expensive lesson too with Leupold rings. They work just fine on any 'regular' rifle and scope combo. They do not work on light-weight magnums with big scopes. I have eaten two pairs of Leupold rings on my 300 RSAUM Model 7 with a Zeiss 4-14 on top. I don't need all that magnification on this particular rifle, but I do love the optics. The third pair appears to be holding their own, but the first set cost me about $150 worth of ammo and reloading stuff before I realized what the deal was and the second set cost me fifty bucks. That set was crap from the get go. When I get some additional funds, I want to put a Near base or some Burris Sig rings on their to give me 20 MOA or so. I don't think I will ever trust Leupold rings (or bases) on a custom rifle
or LOUDENBOOMER RM calls'em. Costs too much in the end to have to replace everything, the bullets shot, time wasted and rezero work. I'll do it right from here on out now that I've learned my lesson the hard way (in the wallet)!