You did the right thing buddy so don' t second guess yourself. If there was a question in your mind about successfully pulling off the shot then you did the right thing by not shooting. I applaud you. Too many people make the decision to let an arrow fly on an iffy shot and then later regret it. The shot you described can be made but it is not a high percentage shot in my opinion. It' s even harder to make with the deer moving as you described. A broadside shot on a moving deer can be really difficult. On a deer moving away from you a walking shot would be way harder to make. A lot can and does go wrong when you have to come in from the top of the deer to get to the vitals. Me personally...I wouldn' t have shot either. Jim