I've had a deer with no internal organs in her at all run 200+ yds. Hit her in the brisket facing me with a 300gr SMK going 2800. Blew ALL of her chest and guts out the bottom of her paunch. Heart, lung, liver, intestines, stomach, kidneys and some stuff I couldn't ID laying under where she was standing. She still ran at least 200 yds.
IDK what people expect a bullet to do. Animals are tough and usually don't even know they are dead, they just go.
I bow hunted for a long time. A 75 yd blood trail was AWESOME.
Yep, I've been bowhunting since I was 12, so I'm used to deer running and having to track them. I've spent majority of my life deer hunting, and based on my experiences with things not going to plan, I agree. People expect too much from a bullet, and don't understand that every single time you shoot an animal, that animal is going to react differently to it. Some run, some go into shock, some fall over... You just never know. I've seen them like yours where they basically were gutted and still ran for 100+ yards, and I've had a few bang-flops, too. But mostly they run (usually 10-25 yards) for me, even with perfect shot placement. I've had Hornady, Barnes, Nosler, and Berger bullets all fail on me. The Hornady SST was the only one that grenaded on impact, the rest were failures to expand. But in all instances, the animals were recovered. The Berger incident was the best by-far. Perfect high-vitals shot, hit the CNS, bang-flop. Pencil-sized entrance and exit, literally a dime-sized large drop of blood on the ground, and that was it. When we first pulled up to it, my uncle helped me load it into the Mule, and he (jokingly) accused me of missing, and said he thought it had a heart attack and died from the scare of the gunshot.
So I said, "No, I'm not you, I hit what I aim at..." (the day before he had missed a coyote, and a 10-point the day before that).
When we ruffled the fur, we found the entrance and exit, so he had to admit I shot it.
In his defense for the two whiffs, after some quick diagnoses back at the camp, we determined that he was having ammo issues with new ammo he had never used before...And hasn't used since.