Mr G., I think the results from a 1 5/8 Mini would be very similar to the PT-22 since auto and revolver barrels are measured differntly. Meaning that they are actually closer in length than the stated measures : )
Danny, I ain't even had a chance to unpack the box yet, but I am getting the urge to splatter some gel real soon. I picked up a S&W 442, for the .38 snub tests. Still need a short barrel .357.. oh well, guess I gotta buy another gun.
GL