I wonder what the record is for most rounds used to bring down a single deer...
... my worst was very early in my stalking career (I think my 3rd or 4th beast). 100 yard(ish) shot off sticks. Went low and smashed a front leg. It ran, but stood briefly at the edge of a thicket. Second shot grazed back. Bolted into thicket. Waited 20 mins (too short, I know, but I was inexperienced and impatient), then waded in. Bumped it and it limped into a clearing. Rushed a shot as it disappeared at far side of thicket - clean miss. Mag now empty, so fumbled to reload while trying to follow. Dropped 2 rounds in long grass - too thick to look for, and desperately trying to keep eyes on beast.
It then bedded/collapsed in a very thick patch of thorn scrub. Managed to crawl to within 5m of it. Attempted 2 head shots - completely failed to hold off at such short range, misses both. Finally ended up within about 1m, and sighted down the barrel.
6 shots and 2 lost cartridges for one deer.
Ever since then, have always had at least 10 on me.
I learned a lot from that one outing, and fortunately have never made quite so many mistakes in such rapid succession again!