Bill I think you are confussing the two gauges. "Jon Hosford's gauge gives better results, but not quickly at a gun show table. " I think you mean the Manson gauge, because with Jon's gauge setup is quick, like I said before, I can clamp it (clamp is in the box) on the table and check both barrels in a few minutes or clamp it to the box that it comes in and use the gauge. I could probably set it up check a couple of barrels and put it back in the box in the time it would take to setup the Manson gauge
