Paul, I'd start with the latest Ramshot online loading manual. They provide data for both .223 and 5.56 loads. Keep in mind, bullet selection matters. As an example Hornady Vmax typically have a greater bearing surface then a Nosler Ballistic tip of the same weight. Consequently, if I work up a load with NBT's, I'll back off a grain if I switch to the VMAX.

You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.

You cannot over estimate the unimportance of nearly everything. John Maxwell