Shot into Clear Ballistics gel at a distance 10 feet using an S&W Airweight model 442 with a 1.875-inch barrel. My coronagraph is still in disrepair so I will have to shoot it for velocity after I get it fixed. Two rounds into bare gel and two into heavy clothing covered gel.
The first round into bare gel penetrated to 13.25 inches and expanded to .57 inches. Round two penetrated to 13.5 inches and expanded to .57 inches also.
In the heavy clothing gel the first round penetrated to 13.5 inches and expanded to .56 inches. Round two went to 14 inches and also expanded to .56 inches.
I was finally able to get some coronagraph data.