What was the Original Loading for the 3 inch.Cartrige that this Gun was built for?.I want to "Test" the new Stock & Forend that I have built. Offered the "Opportunity" to 'Step back in Time" and feel like Frank J. Barthmaier did the day Ansley H" gave him the gun, to my "Old Friend the Author of The Book". Am awaiting his RSVP. Barrels are all Orig. Spec's. cc/dt