Who says 6creed isn't? Bunch of folks here have them and that is with needing to rebarrel certain brands (tikka), once the newly released factory 6creed tikka hit the shelves you'll see more of them I am sure. EDIT: sorry didn't realize you said factory rifles. Tikka is finally jumping on board FYI.
I picked up some of the 89hbc and 90hht recently to try out in my 18" 6creed, ran velocity ladders up to ~3200fps with some ejector marks, I'll back off to around 3050 (no marks on brass at that charge) to take it easy on the brass. Haven't validated the BC on them (hammers have inflated them in the past with their other lines) but if it clocks in near what they say it'll cruise along nicely at my altitudes.