I'm no good at theories and what not. But Geoff did tell me that the higher the velocity the better the hydro will work in terms of wound channel.

My tally with the hydro and the Ruger single-shot .450/.400 3" amounts to just five buffalo and one small pig. They have brought the buffalo down as quick or even quicker than soft points from my .416 Rigby, and they give me wonderful confidence in knowing that whatever the angle, I can reach the vitals. Having said that, I have only hit side- or front-on with them so far. They have all passed-through, except one of the end-for-enders.