I have a custom .40 with a Green Mountain and am now quite satisfied with the groups. When originally made the gun had a Getz barrel, for which I had to pay extra and wait a ridiculously long time for delivery. This barrel wouldn't print consistantly in an 8 inch circle at 50 yards, much less on the head of a squirrel. I enjoy time on the range and tried every concievable combination of powder, patch, ball, and lube. Needless to say, I would recomend the Green Mountain but only suggest you avoid a Getz. I have no experience with Rice.