In one of Palmetto State Armory's latest e-fliers they listed an AR mid-length rifle kit (everything but lower itself and rear sight) that uses the .223 Wylde chamber instead of usual .223 Rem or 5.56NATO. From what I've learned by Googling, it's basically a compromise between .223 Rem and 5.56N; it's "looser" than .223 Rem but "tighter" than 5.56 therefore more accurate (theoretically)? If any can give me the low-down in plain terms or opinions/experiences with .223 Wylde, it is much appreciated.

Here's the kit I was referring to: http://www.palmettostatearmory.com/2277.php