I looked up some Tac data and found that the old manual has some 5.56 load data rated to 62,350 psi and shows a compressed load of 25.8 gr Tac at 2,994 fps. with a Hornady 75 hpbt in a 24" bbl.
Maybe Pharm got a Tikka with a fast bbl?
LOL
Sorry Pharm, didn't mean to get the pressure police all riled up. My bad.