Larry,
If you will look backwards a few days you will see my experience from Nov 01 of this year on cow elk. Long story short, 325yds, 155 Secnar at 2930, dead elk, but no exit wound. I did not hit bone. The bullet was placed in the crease behind the right front shoulder and was found between the hide and the muscle on the opposite side. My load was 46.5 gr of 4064. Super accurate, was an easy load to work . I just probably wont use the 155 again for elk, I like an exit wound.
Bill