I've found that the Reloder 16 Data for the creedmoor is very good on the alliant website. They don't have every bullet listed, but enough good ones to figure things out.
I can't get the Sierra Gamechanger to shoot in my Creedmoor, tried two different barrels OCW from 2500-2900 FPS and all COAL variables... Even when single feeding long ones they still won't shoot. Everything else shoots 1/4". Out of my 260 rem they shoot in the 1's and 2's.
Haven't yet read about anyone getting these things to shoot better then 1 MOA in the Creedmoor, and a lot of people are struggling to get better than 2 MOA. What's the deal?
Include me on the list of not being able to get the Sierras to shoot, at all. They are paper weights now.
