My shortest shot was on a blacktail deer in the Fraser Valley of British Columbia. I was out pheasant hunting (deer tag in the pocket) and we were walking through a field of brambles and heavy thatched grass, pushing the birds ahead of us. All of a sudden a nice 3 x 3 buck got up out of a ditch infront of me at about 5 yards.
I pointed the old 12 gauge and hit him in the ribs with a 2 3/4 inch load of #6 shot. It knocked him right over and he thrashed around for a minute or two and was still. best damned pheasant hunt I ever went on!