I wouldn't shoot a BT at a shoulder blade on purpose, like you might with a A-frame or Partion. BT's weren't designed for maximum penetration through bone. Just too much chance of it not fully completing the job.
If you use BT's I'd only aim just behind the shoulder, or a good, lower neck shot if that was all that was presented(yes I mentioned a neck shot).
The wounds are wicked. I shoot them in 25-06. So far no mishaps, with the above locations.