New member. Not a dummy but not expert yet either. I've gotten a few oldies going again. Gonna need some experts on my latest project though. Last summer I purchased a combo drilling known as a Hild. Hadamar. That's all I know on it, it's short on markings. Unique 3 trigger gun. Two 16 gauge damascus barrels, and one unknown rifle barrel described simply as 44 caliber in the ad. Believed to be manufactured sometime in the 1900 area. A competent gunsmith friend and I have been trying to discern the rifle caliber. He made a casting, and wow, is this thing unusual. We've read through "Cartidges of the World" and have poured hundreds of hours into internet research, and haven't come up with much. I suppose with my luck, one of you will know what it is right off the bat. Here is the quickest and easiest way I can describe it. If you take a 43 Mauser case, and cut off most of that exceedingly long neck till the total brass length is exactly 2.00", and then bump out the neck diameter to .480", thus reducing the shoulder to barely noticeable, then you have a case that is exact to near exact in ALL other dimensions (refer to 43 Mauser dimensions). Problem #1: What the heck caliber is this? Some dimensions match some calibers, but none we can find match in all. It appears to be some wildcat? Problem #2: The outer neck diameter is .480", the inner groove of the barrel is .440". I can make a brass case in the above dimensions as I've described it, but the neck seems designed for a 45 caliber boolit. But the barrel is designed for a 44 caliber boolit? How do I make that work?