You'll enjoy them alot Gil
Adam is correct, bore sizes can vary wildly from rifle to rifle.
I've heard of .307-.314, with the majority seemign to be .308-.311
I was rather surprised/disconcerted this summer when i tore mine down completely at just how much cosmoline there was buried back in the little nooks and crannies.
Still not bad rifles at all, and as reliable and tough as a steel tentpeg.