The 375 of small bores is relatively apt as a 220 gr Partition froma 30-06 will typically penetrate at least as well as a 300 gr Partition in the .375. And most times a bit better.

Phil Shoemaker
Alaska Master Guide,
Alaska Hunter Ed Instructor
FAA Master pilot
www.grizzlyskinsofalaska.com

Anyone who claims the 30-06 is not effective has either not used one, or else is unwittingly commenting on their marksmanship.