This should tweak a few, just my experience, shoulder shots can be deadly. I have actually lost deer due to a leg bone / elbow hit but never on a direct shoulder hit. One exception to that, the off shoulder hit. This is as in tracking . You may have lung but in hill country deer even with a heart hit deer can travel a ridiculous distance. So off shoulder lung is a no blood track not good hit to me Direct shoulder hits can drop a deer in it's tracks. Now because I shoot instinctive and also open sights with my shot gun. I always take the shoulder shot in gun . This has caused me to inadvertently have an eye drift in bow . So the rt to left deer movement and a left drift has hit shoulder a few times. They drop in their tracks. I shoot low poundage and have had near complete pass throughs. There is a bundle of nerves and vessels there that when hit takes them down. Because of this occasional drift I tend to aim tight to shoulder in a lft to rt deer travel. So a drift puts me direct lung . Now from a trackers view they have said they prefer a center body hit all day long. The best recovery times. I have a pic on the computer of a doe that had a near complete shoulder pass through. 49 pound older Hoyt raider / intruder at 20 yrds. A real pain because I couldn't get the shaft out until I butchered her. She dropped in her tracks and died in seconds. Three others 2 doe and an 8 pt all did the same. I've lost 2 to off shoulder hits and a buck to a leg lung hit. Down hill runs into the " void". Ps..I'll look for that pic.