For what it’s worth, the absolutely largest bodied bear any of my clients has taken was estimated to weigh between 1600-1800 pounds and was killed with a single 180 gr Partition from a 300 WM.
The shot was appx 60 yards and the bear ran 40-50 before dying .

The worlds record bear, skull size, was taken in 1952 with a 30-06


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.