If you use the .223 consider your bullets well.
This.
Which in my opinion means no railroad spike tough monos. The 223 isn't fast enough to stress a decent soft point, no need for a mono.
A 55 grain Ganeking or any other soft point will kill very fast.
A Partition would be the "toughest" bullet I would use and even then the front end of a Partition is softer than most soft point bullets.
