You are completely missing the point. The wound channel created by the TMK at .223 velocities creates a wound channel that is capable of taking any mammal on the North American continent , including Coastal Brown Bears. There is plenty of evidence in this thread of said wound channels, however I have a feeling you have not gone back and looked through it.
Contrary to popular belief bears of any nature are not that hard to kill. I would say that the reason why most outfitters or guides don't use a .223 is because they are just as ignorant as the majority of the shooting public who are still quoting wives tales that they got from their grandpappy. Add to that the fact that they are there as backup when stuff goes sideways and they need their bullet to penetrate from any angle into any body part. That requires a bit more than the combo talked about in this thread.
Technology in gun and bullet manufacturing has come a significant ways even in the last 10 years.
Rather than continue to believe out of date information (or information that was never true to begin with) I suggest doing the research before making glib comments.
And finally, in regards to the Africa comment, it wasn't until recently that you were even allowed to use a bow in most countries in Africa. It took Ashby to do a ton of research before they would allow it. And he proved that you could kill a Cape Buffalo with a 50 lb recurve if you used the right broadhead and hit them in the right place. So, there is that.