I don’t think the title or contents “classify” the 223 in any particular category.Back to hunting, the 77g 5.56 certainly has its place, specifically smaller static animals at shorter ranges. I would not classify 5.56 as an “all around” big game cartridge as indicated by the thread title since there are so many other great options.
It’s a “discussion” about various animals being shot with 223 bullets. The discussion has resulted in many people sharing pictures and accounts of excellent lethality on various animals. In fact, I’m not sure anyone has shown a 223 to be regularly ineffective on any particular animal. Take the evidence as you will and hunt with what you like and what you are comfortable with.
But just be informed of what you may or may not gain and what you are giving up by going to other cartridges with regard to hit rate, lethality, etc.