Good to hear you got it working well. Your results are just what I experienced with my Remington #4 converted to centerfire. It worked great with black powder, but one day I thought to try it with some loads of 2.0gr. Trailboss. Mistake! It only took two shots to get the barrel loose in the frame. Previously it locked up nice and tight, now it's sloppy. It still shoots OK, but I need to tighten it up one of these days. Stick to black powder and it'll live a happy life. Not to mention the BP loads are more powerful than the smokeless loads, even though the pressure is lower.