Hunt,

You may be on to something. I looked at the ruger website and it showed the ring bases being different heights. Just to confirm, I looked at my .270 ruger and this was the case. I then looked at the 7722 mag and noticed both ring bases were the exact same size. Perhaps the dealer I bought it from didn't realise they were mis-matched. I only need about 2-3 mm additional height for a proper fit. Unfortunately it looks like it will cost me a bit of $ to get new rings. My great deal on the rifle now appears to only be a good deal, and I still haven't shot it yet.
Thanks for the info.

KJ