All good questions, I too am a dirty meat hunter who likes to eat shoulders lol.
I don't rifle hunt deer much since I'm really a bowhunter. I have only recently tip toed into rifle hunting for myself. For the past 4 years, I have taken my wife, her dad and my dad who come up rifle hunting. Most often my deer tags are filled by rifle season with my bow (again, I'm also a dirty meat hunter who loves to eat.... so doe patrol is my jam) in general most of the shots are close close. Thick timber, treestand or ground blind hunting for white tails at ranges up to 100 yards. The only deer I've shot over 100 was the big doe with my grandpas rifle (30-06) that I mentioned above, and that was the only one with an exit. All of the others shot with my 308 (used by whoever needs a rifle) have not had exits. My wife's buck two years ago was 17 yards through the liver and back of the lungs and did not exit. Thankfully we found it before the falling snow covered it up. Her antelope last year was through one shoulder and did not exit, the bullet was under the hide on the other side. Her deer last year had no exit either, but that was the same bullet a 7mm08 120 grain ttsx and she again toasted one shoulder. She hugs the crease tight and I'm not going to tell her otherwise... lol
I have only hunted antelope out west, but will be taking my dad and wife with the rifles next year for elk. More than likely cow elk, but we will see what happens with all of the tag situations. I would like to rifle hunt more, and I will in the coming years.
So knowing more about how I use the rifles, what would change in your advice?