Rugers are probably THE easiest to rebarrel. I have one that is still a switch barrel, a short action MarkII stainless. Right now it's a .250 Savage Improved. Other barrels are 22-250, 243, 308, 7.62x39 [works just 'ok' with the smaller rim diameter on extraction]. Thought about fitting a .270 Win barrel as I have an Ackley Improved [.270] reamer. Would have to be a single shot in the short action.
"Logic only occasionally enters the equasion!"
Alan in GA.