I load my .223 brass up to "normal" .223 loads and my 5.56 about 10% lower to allow for the case capacity differences (10% was semi arbitrary decision, as I'm still working up loads). I do sort brass by headstamps, mostly to satisfy my OCD, no tests done to find any diff. yet. I have always used a 60 degree countersink to remove crimps; easy, cheap, and no problems after a whole bunch of 5.56 and 45 ACP...
My Anchor is holding fast!