I have a new to me muzzleloader heading my way. It looks to be 150 plus years old. Might be a converted flintlock set of barrels. Any suggestions who would be a good choice to evaluate it for soundness to be shot. I can not measure 34 barrels with my current setup. Redneck proofing, tire and string system, to see if it holds up is not my first choice. Muzzleloading shotguns is a new area for me. Any recommendations?