Anyone got any experience with this rifle? I traded for one and got three barrels with it including a .32-40 barrel with the dies and some 146gr Buffalo Arms cast boolits. The fellow I got the rifle from told me to shoot IMR 4227 with the barrel/boolit combination though he said he had never shot the .32-40 barrel and the owner's manual I got says to shoot only black powder in this action. Thoughts? Never had any experience with this caliber myself though I do load for and shoot a selection of different caliber black powder cartridge rifles. Manuals I have looked at that show this caliber say to use between 12-15.4 grs of 4227 which should give some low pressures which I would think would probably be safe to shoot in this action but then again...Any help would be appreciated concerning the rifle/caliber combination. Thanks.