I own a full choke .410 Superposed that seems to have a muzzle diameter of .360 or slightly less, measured by more than one accurate means, small hole gauge, micrometer to measure the small hole gauge, and Vernier caliper. This seems to be impossible if the bore is .410. Schwing doesn't seem to mention .410 Superposed bore diameters. Does anyone on this forum have a mention of factory .410 bore diameters in the Superposed? I would appreciate a page reference in Schwing about .410 bore diameters. Thanks for any reply. Bill Murphy
