Hi! I am new to this forum, and I hope that this is the best place to post this request. I have just purchased an H&R .38-55 Target Rifle after a while away from shooting. After the purchase I have been reading that this rifle can be hard to handload for due to chamber dimensions. Those who use more "modern" powders seem to have accuracy problems with cast bullets smaller than .379 in this rifle, but the rifle chamber seemingly doesn't want to accept any cartridge with a larger bullet than a .378. I would like to shoot black powder or a substitute. An experienced shooter that I know says that black powder will cause more obturation (?) than smokeless powder so I should be able to shoot the smaller diameter bullets such as a .378 or .377. I am drawing up my plans to purchase reloading equipment and am trying to decide exactly what is needed. Has anyone had any experience with this rifle and black powder or a BP substitute? Any recommendations for handloading with black powder? Thank you for your help.