I took it to the range this evening and shot it. I love it! With .357's, it performed flawlessly. With .38's, it double fed a few times, but no real bad jams. Not surprising, I've heard about that before in other carbines as well. Using Monarch 158 SJHP .357, I was getting about 1250 fps from my GP100 w/4" barrel. With the carbine, my chrono showed better than 1700 fps.
Here's my 50 yard group with stock sights and old eyes. I've ordered a Williams aperture sight so hopefully that will tighten my groups a little. All in all, it's a great rifle. My new favorite.