Ever looked at a hunting report?
I was looking over a report of my hunter, who has been hunting nonstop for about 2 years, versus a marmot, which according to wikipedia is about the size of a groundhog.
The poor thing died in a hail of bolts, getting its little tendons slashed, vomiting everywhere, waking up and getting knocked back out, as my expert hunter expended what looked like dozens of shots.
I was thinking that an expert hunter should probably be able to kill a marmot in about one shot.
He's a legendary marksdwarf and legendary archer.
Oh, here's a summary of him versus a mountain goat, too:
Shot #1: right rear leg, goat gives in to pain and falls over
Shot #2: left rear leg
Shot #3: lower body, tearing muscle and stomach
Shot #4: left ear
Shot #5: lower body, right kidney
Shot #6: Right rear leg
Shot #7: Left front leg
Shot #8: head, brain
Poor little goat! I think my dwarf is using his marksman skill as a form of sadism. I suspect that his 8th shot was actually trying to take out the goat's last remaining leg when he accidentally shot it in the head.
I was thinking marksmanship should give a bonus to hitting vital areas (didn't it used to?). Maybe the sheer number of possible hit locations has made it unrealistically improbable to hit a vital area.