Phil Shoemaker, the well-known Alaskan brown bear hunting guide, has done extensive penetration testing, sometimes on beached whales. He's found that the 220-grain Partition penetrates deeper than any other expanding bullet he's used, and Phil has used cartridges up to the .505 Gibbs, and most of the premium bullets made in the U.S.
Has this work been published? I am a big fan of the 220gr Partition out of my .300 Win Mag.
