I used a .223 when I first started hunting with my dad at 6 years old. All my siblings learned off that gun. Right placement of the shot means less tracking. Since then we've all gotten our own guns in bigger calibers. That being said, I am getting an AR in .223 next week. After I play with it a few 100 rounds you better believe I'll be knocking down deer with that thing!
But they that wait upon the LORD shall renew their strength; they shall mount up with wings as eagles; they shall run and not be wear; and they shall walk and not faint.