RE: Deer Aren't Dropping
I have never had a deer drop in its tracks from a broadside shot through the lung/heart area (the same shot that you said you take). The only time I have seen them drop is when they have had the shoulders broken on broadside shots.
Shooting them behind the shoulder will usually let them run off a short ways. I shot a deer a 60 yards over the week end that ran close to 100 yards without the use of its lungs (I was shooting a .300 Win. Mag. broadside). The blood trail was very good. They will also drop on head on shots to the chest also (usually breaks bone).
Cheers,
Donavan