Man of the Fall,
I think 40 yards is the number you will hear from most folks. I have some pretty dependable spots I hunt and there I will pass on on shots over 25 but only because I don't like BB's in the breast meat. I want a clean head shot. I took one at 40 last year in WI but he was walking a treeline and I can't use decoys there due to late season educated public toms. Made a clean head shot anyway.