I've gotten much better results getting a Berger through an elk shoulder than a TTSX or Accubonds, have yet to not get through with a Berger in fact.My only issue with Berger, is the fragmenting part. What if you need to through the shoulder? I like quartering-to shots with an Accubond, Partition, or A-Frame. Especially with a TSX.
So that's my next question. If you go through the shoulder, does anything actually make it to the heart?