I may have read it wrong, if so my apologies to Toccopola but I feel that question was somewhat "loaded".
Photos of wounds, deer on the ground, accounts, ect ect, none of that was good enough, he wanted detailed photos of wound cavities and shredded organs to be convinced. He also wanted yardage, weight of projectile and weight of the harvested animal.
OK I guess I can understand where he is coming from a cold technical stand point, especially if he has been in ballistic books or read some of the propaganda of modern muzzleloaders. The only way to market those is at the expense of traditional shooters and their guns however false that may be especially since they cannot compete against centerfire magnums in the "Jello Factor".
Hunting with a traditional muzzleloader to me is a much more intimate experience. With a smoothbore I have to get set up very close. Being so close I see things many do not. The eyes, the interaction of deer with one another up close, the playfulness, the alert. When you face one of those magnificent critters eye to eye and he makes you, at that moment, he knows it and you know it and you fire.
I always feel some regret. Many a time I have let one walk, just being satisfied in knowing my set up worked. I don't have anything to prove.
Deer are emotional and intelligent critters. One of the most heart breaking things I have seen in the game I have taken was a 4point I took with a .45 roundball. He went less than 50 yards. There were marks on his side where he had been pawed by another deer, not violently but gently, as if another deer was trying to wake him up.
To sum it up, posting pictures of wound channels and shattered organs of such magnificent creatures just to prove a point, for me crosses my line of good taste and respect for those critters.
I'm sure that aspect did not occur to the OP.