I have taken two deer in this situation, one asrecent as 2 weeks ago. Both resulted in very quick kills. The doe I took 2 weeks ago only made it about 70 yards before piling up. She came on a string straight to my stand, i was drawn on her at 25 yards out but never offered a shot. She passed directly underneath me and was about to enter a large pine thicket and i knew i wouldn't have a shot then. I bent at the waist and placed my pin just to the side of the center of the back right behind the shoulder. The arrow entered exactly where i was aiming (shot straight through the backstrap) and exited the deer's brisket, taking out the heart, and stuck in the ground. She ran off about 70 yds and stopped and i could see her tail wagging rapidly and i knew i had her and seconds later she crashed and never moved again. The arrow broke off, most of the arrow was left in the deer, except the broadhead. Came back to where the shot happened and found the broadhead and about 6" of arrow still stuck in the ground.

The other deer was a small buck several years ago with virtually identical results.

I agree that it isn't the highest percentage shot available, but under the right situation i'd take it again.