I had the pleasure to work over a stainless Lipsey's Limited Edition 10mm/40S&W Blackhawk Convertible revolver, and to the astonishment of all who witnessed this, each throat in both cylinders measured a PERFECT .4025" with Meyer pin gages! This, would be a FIRST for me, in close to 2,000 cylinders done now, the majority of those belonging to Ruger single action revolvers. I just felt compelled to report this rare sighting, it isn't everyday you see one this proper from the factory!