I don't know if eightbore has the guns he claims. I do know I have argued with him about using a barrel wall thickness gauge which I believed too inaccurate to get good readings. However the next time I had occasion to use a barrel wall thickness gauge. I reluctantly followed his instructions. I got readings that checked out. I would think anyone that can use one of these infernal gauges knows a thing or two about old shotguns. I believe eightbore is for real.