Congrats on your harvest, and I am glad that you had a succesful hunt despite the bad luck with the deer changing positions. I'm not necessarily sure that you would have had a different outcome with a lighter setup on this particular deer, even though the heavier setups certainly give me more confidence. It wasn't penetrating the leg bone that did your deer in. It was going through all of the soft tissue before it exited. It is always amazing to me when our gear cuts through bone the way it sometimes does. I had a friend in NJ that double-lunged a deer quartering away that cut the offside legbone in half as well. What surprised me was that he was using a 45 pound black widow at the time. I still think shooting the heaviest weight that you can handle is the best policy. There are certainly times when it can make a difference.