You probably already know this, but it bears repeating - be sure your firearm is chambered for 5.56 as 5.56 and .223 are not the same thing ..., etc., etc. Other than that, actual 5.56 nato loads, have for me at least, been fine shooters. I have gotten excellent accuracy with them and they kick butt with their ballistics. What are they worth? That would depend on the manufacturer in my opinion. I have had some from southeast asia that were filthy, and some american stuff that was clean and very accurate. I would not hesitate at 8-12 bucks a box.