G'Day Jeff,

Congratulations, everybody need at least one .375!

Mate, I'm a bit biased on these things, so I suggest you at least look at the Warne range of QD rings that are available for the BRNO 600 and the CZ550 series of rifles.

Malcolm Gault of www.lynxoptics.com.au is a Sydney based fella and he also sells Warne Rings. So email him for a price and availability.
You can also get them out of the US from mail order places like www.brownells.com

Hope this helps.

Doh!
Homer