I believe there are many factors to be considered when taking long shots. The most important being YOUR ability to hit and hit with consistancy the kill zone at those long distances. The others have been listed on earlier posts.

For me it's simple, while I do practice long shots (over 50yds) I don't do it enough to even think about a 60+yd shot on game. I'm too busy trying to hit what I'm aiming for at 40yds and under

To answer your question, with your set up and at that distance,youhaveenough energyfor good penetration on a whitetail even if your shot placement is not perfect. As far as elk go, as long as it's agood hit you will have no problems with penetrationthereeither.