I wanted to post the measurements of the bores, chokes and wall thicknesses. The right barrel choke measures .700 with a wall thickness of .060. The left choke is .695 with a wall thickness of .065. Both chambers measure at .732 just in front of the chamber inside the bore. The chamber measures .800 at the front of the chamber and .808 at the opening of the chamber. The chamber depths are as they left the factory at 70mm which is equivalent to 2 3/4".