I would call Nathan Foster One of the most knowledgeable people worldwide on the subject of terminal ballistics. I own several of his book, the most recent one he wrote on the subject does cover the more modern heavy projectiles for the .223. He speaks quite highly of the the likes of the Hornady ELDM and the Sierra TMK's. He tends to recommend the Match grade projectiles for longer ranges because they tend to expand better than some of the heavier jacketed projectiles like the Barnes Tripleshock intended for game shooting.
His writings on Long range shooting and bullet performance on game are great reads, I recommend them for both seasoned hunters and newbies.
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