BobCo19-65, yes I did notice he was modifying the tip. The modification is similar to the standard tip on the Magnus Stinger. Basically, they're grinding away the thin metal, until they reach thicker metal.

ijimmy, he actually had a problem or two with the Silver Flames. If I remember right, he had some penetration problems that had something to do with the ferrule. As I recall, he said the fix would be an easy one and that the maker was already working on it.

A couple things I noticed in his studies that I hadn't seen studied before: First, I see that he got better penetration on heads with a single bevel vs. two bevels. I hadn't even noticed that companies were making single bevel blades. Second, arrow shafts that were significantly narrower than the broadhead ferrule had much better penetration. This does make a lot of sense, I just hadn't seen data on it before.

His testing is being taken very seriously by many of the broadhead mfgs. Many, are soliciting his comments and modifying their heads accordingly. He simply has the best data out there on what works and what doesn't.