I read the article, this is so outdated as to be totally useless, I noticed the 416 calibers were not mentioned as they rarely existed in North America.
Solids were rarely seen back then either, nor limited expanding solids such as Hornady DGX or Barnes TSX, and many others on the market today.
The comment about a 30-06 being a suitable Bear stopping round has a single flaw, a 30 cal cannot make a big enough hole with a solid as say a 416 or 458, with a limited expanding solid it does not carry enough energy
to penetrate deeply when the diameter increases.
Look at this article: http://ammoguide.com/myag/articles/h...ration0802.pdf