I hope to start turning my two .45 caliber blanks this week for the .450#2 NE which I'm building. I'm very interested in hearing from anybody with a .450 NE, .450#2 NE, .465-500 NE, .470 NE, or similar Nitro Express calibres, as to what the outside diameter of your barrels is at the muzzle and at the midpoint.