Ruger chambered the M77VT in both 22PPC and 6mmPPC. Also chambered the No.1 in both calibers. The guns do fetch a bit of a premium for those calibers.
I love mine, it "forced me to buy the other caliber then one of each in NO.1
I believe the M77VT is a very good gun for the money, the trigger is adjustable and my 6mmPPC has had the first stage of trigger pull removed (still factory trigger). Accuracy in these rifles is suprising. If only the No.1s shot that well as they are my favorite