Confederate said:
Remember that shot by Elmer Keith at 600 yards with an iron sight .44 magnum that caused a lot of people to call him a liar?
FWIW, Keith's own description of the event isn't pretty, and involves more than a single shot: After his client wounded the animal with a poor rifle shot, Keith missed on
his first shot, hit it at 600 yards with the 2nd, but the bullet hit the deer in the jaw and exited the nose. Keith's 3rd shot knocked the animal off a ridge, out of sight, but very much alive. After 2 more shots from the client's rifle, the animal was still alive, "walking along all humped up very slowly", and it took a final (by my counting) 7th shot (again, by my counting, 6 of which hit the animal) to finally drop the animal.
Back OT, as far as revolver groups...
Here's one from CoolLuke's recent THR match: 4" DAO S&W 686 .357mag. 10 yards, 3 rounds supported & 3 rounds standing, unsupported (0.25" & 0.26", respectively).
...And one using a stock 4" S&W 617 .22LR, 25 yards, standing, unsupported, shot double action. 5 rounds @ 0.95"