Steve I have tried all three with Varget coming the closest to shooting like the CFE223 and H4895....close but no cigar!
I did get good results from RE-15 and a Sierra 77gr HPBT...none other powders did as well as RE-15 with this weight

My shooting partner and I did loads of testing with the Savage .223 mine being an Axis with at the time only a Rifle Basix trigger installed and his one of the upper end Savage w/accu-trigger... right over $600 brand new IIRC. His loved the Hornady .68gr HPBT with the same powder and load as mine. We went so far as him giving some of his bullets to load for my gun and I did so as well....Neither gun shot them like the picture I posted!

Since then I have put it in a CF2 wooded stock with pillars and bed the whole action and it shots better then that if I do my part!. I have shot out to 350yrds with it with the same results.