Mike: I understand your reasoning, but I disagree with the testing methodology. If a bullet hits nothing but soft tissue, the gel is a great simulation. But it doesn't show what the bullet will do after striking tissue-enveloped bone. A better test would be to have a bone simulation of rib-like thickness set at a depth in the gel to simulate human upper torso. (If you want to get elaborate, look at the gel torsos on DEADLIEST WARRIOR.) Test results in that medium would be far more informative.
Proud member of Gun Culture 2.0......