The post is “.223 for bear, deer, elk and moose”.  As I stated earlier, if it’s legal in your state go for it.   Even with the 77 gr TMK, it will fall below 1000 ft/lbs of energy around 160 yards.  For small deer at close range (less than 200 yds) its probably fine. For large deer I feel it’s marginal, especially at range.  For bear, elk or moose its probably unethical.  Magnum cartridges are unnecessary however I feel we owe the animal a quick clean dispatch with a cartridge best matched for the quarry.  I realize this is an unpopular position on this thread, however I respectfully disagree.  After 30 years of military experience with 5.56 cartridge, I have doubts on its suitability for big game.