"Actually I might make an argument that for deer size animals, .223 is very effective. When using HPs or softpoints, the 55 to 62-grain bullet usually would not exit the deer, thus dumping all of its energy into the target.
You would most likely have exit wounds if you use .308, .30-06 on deers in broadside shots."
That's why I went to a 6mm REM. My 30-06 bullits were exiting the beast.
"Power always has to be kept in check; power exercised in secret, especially under the cloak of national security, is doubly dangerous." ...William Proxmire, US senator, reformer (1915-2005)