tsa45,
Your post brings up one of the reasons I come down so harded on bullet integrity.
No matter how hard I try to assure my shots are good, behind the shoulder also being my choice, this is hunting we're talking about.
Last Fall, my elk was taken at about 100yds. The critter was standing broad side and I had a clear through and through, behind the shoulders hold.
However, in that instant between the touch of the trigger and the time the bullet hit home, things changed. Remember, this is hunting and not shooting at a fixed target.
The bullet exited exactly where planned/desired, but entered through the near shoulder. Clearly the elk shifted positions during that instant. I had enough time in the process, to turn my scope to 7x so the sight picture and the critter were clearly seen before the trigger was pulled.
Thankfully, the 465gr WFN cast has a high level of integrity, meaning it is not likely to blowup or fragment to any great degree and the bullet went through the shoulder blade and not through the heavy shoulder bone so meat loss was minimal.
But, going back to the 2011 elk, taken within feet of last year's critter, and at the same range, this was a quartering shot entering through the near shoulder, taking out the large shoulder bone, a rib, through the lungs, all the way through a very full and heavy paunch and surprisingly stopping just under the hide in front of the off side hind leg.
The bullet started at 465gr. +/- a few tenths, and ended up at 327.9gr. Had this bullet, cast or jacketed, been of lessor integrity, not only would there have been much greater meat loss, but the wound channel would almost certainly been much shorter.
Yes, my shot of choice IS, without question a behind the shoulders hit, but in hunting, for whatever reason we can not be 100% sure that is what will happen. Therefore, Bullet integrity is high on my list.
Probably an Ol'Coot thing, but my first deer taken with a handload back in the 60s, was taken with the long ago Hornady cup and core bullet before the days of the now MUCH better interlock, and that bullet came apart, sheading the core and leaving the jacket behind. The next year I was hunting with Nosler Partitions.
Crusty Deary Ol'Coot