There were several flaws the boys missed.
First the .36 was flattened, but notice how it wasn't wider than the body with the imprinted rifling? It was flattened by loading, NOT by the impact.
Next, while it's nice that they used pretty large bullets in the .36 and the .44, I would they had used round balls in all three first, THEN sought to show how using the heavier conicals compared to the more common round ball.
Third, I would have preferred to have them do an additional test, with new gel, using a side of raw pork ribs of a thickness comparable to an average human's rib cage inserted 1" inside the first block. They would have had a much more realistic result of what soft, lead projectiles will do after it passes through bone, giving an idea of the actual mushrooming that might happen. Perhaps the .31 would not have been "barely adequate" unless one gutshot or headshot the bad guy???
So an interesting video to compare energy..., not sure of performance.
LD