YOU may be convinced,but since the animals were not recovered,you have no way of knowing where the bullets actually struck,or if they expanded.
I know they hit from the sound and the blood found. I tracked one for over a mile before I had no trail left. Other than those 3, I've never lost an animal. So your right, I don't have proof. Here's my stories, take em as you like....
The one shot with the front stuffer dropped in it's tracks before getting up 30 seconds later and running. It tripped and did a cartwheel 200 yards later, before disappearing in the bush. I tracked through the bush for about 200 yards before losing the trail. I think he tried to cross a large waist deep pond, and dropped in it somewhere. I'd tracked that deer for 3 years before figuring out where he came out. Shot him first day of muzzleloader season. Partner said he was the largest deer he had ever seen in the area.... I said that's why I've been trying for him for 3 years.... The single most traumatic hunt and lose I've ever suffered. I would gauge him at at least 180... That's the one I quite TSX's for deer. To analyze, I hit him hard enough to knock him out and down. He didn't bleed a lot, but I could track him. I can only say that I hit him proper, but the small hole didn't cause a lot of bleeding. I have no doubt he died. Just that he went a long way before being "gone". I think he's still under water somewhere.
The first rifle deer I shot at about 80 yards with the same buddy as above. A nice deer, around 150. This was my effort to "replace" the buck in the above story the same year. After shooting him he bleed a lot. It was no problem following him, large spray areas where he wheezed lots of blood out, very easy trail. We would track 400 yards or so and jump him, and he'd go another 400. After the 3rd or 4th jump, we waited til morning. When I tracked the next morning from where we ended, I found him. Someone had hacked off the antlers with a saw. Nice "V" cut. Talk about disappointing. Perfect shot, right through the lungs. So this one was recovered. If you want, PM me and I can provide the DNR officers I brought out to show the site. They took the head to match at the horn measuring that year because it was taken at night because I tracked til midnight and was back at 6 am with permission to track on a Sunday....
The second rifle deer was from a stand I had on a rock pile. Shot him in an alfalfa field on last day of deer season at about 60 yards. He was hit, because I heard it. His head went down for a second, he slumped almost to his knees, and then staggered off. I was sure he was only good for about 50 yards. But when I got to the site, absolutely nothing. No trail no nuthin'. I scoured a circle pattern out for hours and still didn't find anything. At least this one didn't break my heart like the first one, as it was end of season and I was taking a sausage buck. He was small only a forker.
Anyway, I didn't say that none of the bucks were recovered. I should have elaborated.