I'm just curious as to the lack of info,
Can you be more specific as to what you mean by "lack of info"?
Hodgdon has over 40 55gr bullet loads listed with four different types of bullets, FMJ, Solid copper, Sintifire and Jacketed soft points tested with over 17 different powders.
What more are you looking for?
The most extensive load data for the 223/5.56 can be found at Ramshot and Accurate.