I'm going to do some more "mix and match" using old ordnance. There's a light bronze Spanish mountain rifle with no carriage, that I want to shoot off the steel Skoda mountain carriage I've used for several other small tubes. The trunnion diameter and distance between rimbases look like it will work but I should find out for sure real soon. The bore has six very deep grooves, land-to-land measures about 2.95 inches. I made many 2.85 or so inch lead trash can projectiles for another ML rifle, so I'll try those in this gun. The rifle was made to use the studded projectiles, of course, but I want to see if the trashcans will work in something with grooves as deep as this Spanish rifle has. I can't see there will be any danger in trying, the worst that could happen is the lead will rupture in the bore and blow through at the front. Our current TC projectile design is a bit weak there, which could also be considered a safety factor. TC projectiles can be a PITA to get out of the bore when they fail like that, so good idea to take some kind of extractor tool to the range, or the first shot could be the last for that day.