Over the years I have had many bone hits. Some with fixed blades, some with expandables. Some of them turned out okay and some not so well.
Last year I had two bone hits. The first was with a doe. 13 yard quartering away shot, the arrow exited thru the off side arm pit and then re-entered into the off side leg, breaking it in half before exiting. The second was a buck, 27 yard broadside shot. The arrow entered thru and exited the shoulder blade. Went thru it like warm butter. Both of these shots were with a Rage 2 blade. I had questions also about the Rage's penetration and thought these two shots cured me of any worries. However, I later shot another buck and only got about 12-14" of penetration. It was a 32 yard broadside shot, no bones encountered other than some ribs, arrow was placed right on the money. I still don't understand what happened there, but it was enough that I am going back to a fixed blade. I might have to give the Tricks a try, I have NEVER heard a bad review about those heads.
Here is a picture of the shoulder blade shot.