I like the entry angles. As you say at that angle you will hit all of the "goodies", resulting in very short trails.
My only qualm with this shot is that your margin of error is reduced in that if you are slightly to one side, you will hit the spine. When that happens one of two things will likely happen.....the deer will drop in his tracks and then you'll have to finish him off, or he will run off like Moby Dick with a harpoon sticking out of him and likely as not you'll never see him again. The big problem with this scenario is that OTHERS will, and it's not very good PR for us. I speak from personal experience on this one!!!!
That said, if you have complete confidence in your shooting accuracy at close range, and the circumstances feel right, then it's a good killing shot.
Offer No Apologies.....
NRA Endowment Life Member