No misunderstanding by me that the barrels are NOT parallel to one another and cannot aim with their current regulated center sights without having the magic bullet weight, powder-load, distance formula. I only said the barrels were strait and that strait inline separate sights for each barrel with the gun appropriately positioned to employ those separate sights would result in accurate aiming capability without the regulation formula.
I have serious doubts that the flight of the projectile is affected by gun moment BEFORE the projectile has time to leave the barrel as we use to give demonstrations with modern weapons that this is not the case, subsonic pistols like the .45 model 1911 being a classic example that accurate steady aim and trigger pull regardless how firm the grip i.e. a gun balanced on toothpicks will hit the bulls eye every time as the bullet is long gone before moment occurs. Even if there was some slight affect of setback moment acting on the projectile that affected flight before leaving the barrel, that movement would be consistent to the shooter once sighted and groups would then be consistent. Nevertheless I would bet that using a high speed camera and my Kodiak mounted on sand bags unsupported that you would be extremely hard pressed to see any significant moment before the round left that barrel, unless it was traveling at 900 feet per hour lol. But I understand what your saying but like I said I consider the lack of interest at my gun show table where I offered it in like new condition in its original box with hand tooled leather case, for $700 and it did not sell, a sign from the good Lord to keep it for a while longer and get it to shoot strait.
I have had one mold maker contact me that they in fact have made several bullet molds for the .72 Kodiak double rifle but cannot share or make an identical mold based on privious or recommend data, even if the barrel sheet data to make the mold is identical, because they create every mold from scratch and start over every time. Go figure that one out...Anyway I have allot of trial and error in balls and powder to go thought before I decide to waste $250 on someones idea of an alchemistic "one-of-a-kind" mystery mold. I have decided to order the $36 off-shelf .710 round ball scissors mold recommended since they don't sell those balls. But tomorrow morning Im headed out to check out and join the local range with two cans of 10 year old FFg & FFFg, thirty .715 round balls and twenty-five .69 minnie balls to try and get my double rifle sight-regulated as-is. Also to finally shoot my AR/50 BMG with 46" M2 barrel at 1000 yard targets, instead of the privious point-blank 400 yard target ranges in VA. 8^D