Hey SJF,
How much Blue Dot are you using with the 55 grain bullet in the 223. I have read about the 12.6 grain loading, but I haven't tried it yet.
I currently use 26.2 grains of WW748 with 55 grain bullets (Hornady SP). It is deadly accurate, but I want less recoil and noise from my 14" barrel Contender.
Harold Clark