I guess I have the luxury of hunting in mostly open country... no crawling through brush, they either drop right there or run a few yards... that being said, I rarely shoot once. I don't stop shooting until it's down.
Yes, I learned a long time ago to put the hurt on em, or shiit gets ugly... Deer get smashed through the shoulders, don't like boning em out anyway, and the stay put. Its pretty nice huntin open country for sure. Another vote for, shoot til they stop wiggling...