Based on their thread I must be a he man's he man. I'll do it with an iron sight 58 cal Enfield or Springfield musket, no sling or bench. Both of mine can hold sub 2 in at 50yds.Try the grapefruit challenge from about 10yr ago. Grapefruit sized target, off hand at 50yd.
http://www.flaguns.com/forum/general-discussions/gun-related-pictures/10335-grapefruit-challenge
Our pigeon board has 32 clays (4 in dia), 8 guys shooting, against a bunch of other 8 man teams shooting their pigeon boards, clocks running, fastest time wins with penalties for unhit pigeons, no pressure! Our 100yd event in the match is 6in tiles, so a sorta 6moa target. Same conditions, fastest time wins, no pressure, open fire
Given the amount of offhand shooting I do with those old iron sight guns in practice, there's a reason I am unimpressed by the mall ninjas and the tacticool pew pew at 25yds. Hell, that's inside smooth bore range.