We use our HMR's with mil dot scopes for shooting our Columbia ground Squirrels out to 200yards. The first year using them, we went all the way to 240yards, but had to many crawl-offs. Every year though, if and when I'm using my Martini .17 HMR, I manage a rat at 281/2/3yard mound of holes - 4th mil dot on my scope. At that range, the Marlin HMR will put the bullets all around that rat with him looking at each bullet splash, but the Martini is one shot, one rat.

At 200yards, you can consistently get head and high chest hits. The chest is about 1 1/4" wide, 1 3/4" if looking sideways. Wait, wait, wait, POW/SPUK!