50 yards
I've got a 6" metal disk up behind the house, at not quite 50 yds but close enough. (that's where the natural backstop was).
I shot, and still shoot at it quite a bit. Twenty years ago, I hit it a lot more often with a handgun, than I do now.
My most consistent hits, when my eyes were thirty something instead of fifty something, were with a M-29 6", and a Ruger Mk II heavy bbl .22 with the medium length heavy barrel, .......5-1/2" or what ever they were. I shot both those pistols better than any other handguns in the arsenal. Oddly, I traded both, because they seemed so big and heavy holstered in the field. Seemed like all I used them for was to shoot at the gong. Finally decided I did not need gong pistols and got something else, a .44 Mtn Rev to replace the M29, and I think a Glock 20 - 10mm. A std Mk II 4" already on hand, sufficed for a .22 auto.
NOwdays, the eyes seem to see the front sight on my Dad old Single 6, w/ the what........6-1/4 in bbl, is what I think they have. It wears the .22 Mag cylinder and is zeroed for same.