I have been reading the many threads in this website about bear protection advices and it was truly a pleasure to read.
Based on conventional wisdom, terminal ballistics for antipersonnel ammo need to dissipate all or most of its energy into the target to be most effective; better still, if the round becomes unstable upon entering the target and tumbles, the amount of damage would be even more devastating.
Having said this and reading Garrett's articles in his website (Garrett's Cartridge), it appears that penetration is everything at all costs.
One thing I am not understanding is that his idea is to make the rounds go through the large cape buffalo, bear, or whatever instead of allowing the round to dissipate all of its energy into the animal. In one of the African Safari stories in Garrett's website, there is even a cape buffalo that was shot under its chin and the bullet passed thru the animal and exited from the rear.That seem to run contrary to the way we understand when we're discussing antipersonnel ammo.
I understand that his intention is to break bones when the bullet meets with bones but isn't it better for the bullet to be unstable (i.e. tumble) after it passes the thick skin and fat layers?