An acquaintance of mine due to age and health related issues uses the .223 for 95% of his deer hunting. He is using the Barnes 50 and 55gr TTSX and they drop deer like a lightning strike.
That said my close friend and hunting pardner used them as well in his Swift, with equal results on a couple of deer and hogs but, and not due to the bullet, somewhat lacking results on a couple of others.
If your going to use them on deer keep the shots tucked tight in behind the shoulder, but not through it. The Barnes will turn the lungs and heat into minced meat, but the shoulder will absorb what is needed if you put it through there first.
Mike / TX