I don't use a 223 but looking at their web page, the 50 gr Nosler Ballistic Tip would be my choice. I use them in both my 22 mag(40 gr) and my 270 win(150 gr) and love them. http://www.ultramaxammunition.com/rifle.php
Jim Zumbo, Craig Boddington, Ron Spomer and Wayne Van Zwoll are all solid contributers to the modern hunting literature. Through their gifts (both hunting and writing) they make us better hunters. Whether it is letting us learn from their mistakes or by teaching us new techniques,they help us harvest more game. But I suggest looking to the oldies, the fathers of the outdoor writing craft, to learn tricks that you might have not used.
I chose to shoot the 270 winchester because I grew up...