Nosler partitions and Sierra game kings out of my 30-06 with similar placement have dropped nearly all my animals near to where they stood but have never punctured the gut cavity.
If you shoot enough, weird things happen.(this thread, and your post, reminded me of the following ordeal)
Back about 30 years ago I took an easy shot on a meat doe. She was perfect broadside at about 150 yards and I had a good rest. Most importantly she was perfectly broadside. I could punch through and not destroy any shoulder meat or hit guts. A nice
clean meat deer.
She was facing down hill at probably a 50-70 degree angle.(very steep ditch trail) I shot and she dropped out of sight into the ravine. The instant that I hit her blood trail I could smell stomach.
What the heck???
To wrap this up I had hit her perfect dead center in the ribs. Perfect double lung.(
or should have been) Instead I had a hole in the diaphragm, liver, stomach, liver, diaphragm. This was a 140 gr Nosler Partition out of a 7mm Rem Mag cooking about 3107 avg.
All I can figure is that she had exhaled deeply and every thing inside of her had slid forward since she was standing radically downhill. Nosler Partitions are insane penetrators that always open.
Now, I am not sure about that JFK 90 degree turning bullet.