Gutshot: I used a 17 Mach2 barrel however either would work fine. A little work on the extractor and I was in business, it shot extremely well, at least in the horizontal mode, it would do an honest inch horziontal at 200 yards, however I could never fix the vertical stringing which was about 3 inches at 100 yards. I just don't have the time to figure it out, so I sold it, someone will get a really nice shooting handi when they solve the vertical problem. I also had the barrel turned down a little so it wasn't too heavy, re-blued etc, I probably had near $350.00 in it by the time I was done, but it would have been cheap if I had just done the re-chamber. I had the same guy do a barrel for my Savage 10 in 17 Remington also, I know that one will shoot. I ordered a barrel for the handi RF donor frame in 22 Mag to use for Coyotes when only a rimfire is legal, so I still have one handi. Larry