Holy Crap! That's some pretty dang good shootin' there James B.

My only "pistol rest" was just my two hands using a firm grip, and resting on a rolled up
blanket, towel, or whatever was handy to place on the bench. 700 rounds in a week?
Given our dept. budget, and my own, I was lucky to shoot that much in 4mos. time.

Those Dan Wesson revolvers were sure accurate. I never owned one, but knew a couple of fellas that used 'em in 44mag. They'd shoot clay targets at 100yds., and did
pretty good at 200yds. too.
My hunting revolvers were a S&W model 57, 6" 41mag., and later a Ruger Redhawk,
5-1/2" 41mag. The Redhawk was pretty accurate. I managed to hit clays at 100yds. with it most of the time. Sad to say, those guns are gone, and I just use rifles now.
Eyes don't see well enough for much with a handgun beyond 50yds. or so. Still do pretty fair out to 25yds. though - good enough for "social" work.