Thread: Ballistic Gel

There have recently been some posts on the forum showing results of different caliber and weight projectiles performance in blocks of ballistic gel. Apparently this gel mimics what you would expect from animal "tissue".
I have never handled such gel, or even seen it in real life but how good a representation of performance on a real animal is it? It looks to me like I could poke my finger into it (unlike a deer which has a protective skin) and there is no similarity to bone whatsoever?
If you put a thick piece of leather in front of it would the results for different projectiles be the same? Would the more frangible or lighter projectiles suffer greater performance loss than others? Would a bone in there change the comparative differences?
I am interested to hear peoples thoughts.