I bought a used Stevens 200 SA rifle and the guy included what he said were Leupold weaver-style bases. I tried to mount the Simmons package scope on it that came new on my Savage, but the crosshairs were so low the scope didn't have enough adjustment to bring them up to zero. I noticed that the rear base was higher than the front. I replaced the bases with the same height ones that came off my Savage package gun and it was fine.

Now the same guy asked if I'm still interested in buying the Leupold scope he had mounted on the Stevens. I am, but am concerned it could be slightly bent if he had it tightened down on the different height bases. He was using Leupold weaver-style rings but I assume they are same height front and rear?

The same height bases off my Savage package gun were like these...


The different height (Leupold) bases look like these which say they fit a 10/110...
http://swfa.com/Leupold-QRW-PRW-2-Piece-Base-P968.aspx

Does anyone know why the Leupold bases would be different heights? Are the Leupold weaver-style rings different heights to match the bases?