Well, you've held up pretty well to all the comments, some good, some bad, but good experience for all of us. Of all the posts I read on the different forums I think I learn more from bullet failures the most.
Its really hard to ask one bullet to do everything at every dstance, you just have to load up for what, in your experience you will need. Again you are rolling the dice.
I'll give my 2 cents worth on guns, bullets, distance & shot placement. Since I haven't used a rifle in many years my opinion might be outdated. First I don't think a magnum anything is necessary for deer, agree or disagree, I don't think premium bullets are necessary either, good ammo, either factory or handloaded will handle any deer out there. As with a revolver (my choice) you have to have 2 things, shot placement & pentetration, you had shot placement but because of all that extra horsepower at close range your high speed thumper hit like a lightning bolt, 400-500 fps slower & it would have exited.
Distance is always the unknown, you can control everything else but distance "almost" never can be predicted. Now to shot placement, this is the controversial one, just my opinion here but head & neck shots should always be avoided, they can be spectacular or they can fail miserably. I doubt anyone who's ever gone with the head shot rule can say every miss was a compete miss! Shooting through the ribs will waste almost zero meat, there's a lot more meat on the neck than there is on the ribs. Not much meat on either!
I know that eastern tree stand hunters are usually shooting at an unalarmed deer at a known distance & usually from a rest, thats much different than here in the wild & wooly west, I've seen 2-3 deer running around with their lower jaw shot off, its not a pretty sight. The shot behind the shoulder is much safer & the argument about losing meat just isn't really valid....my opinion!
Dick