It i a proven load in my rifle (125 times), now, i will start lower with the Sig, working my way to the max, plus this is documented how R-17 and 208 Amax can be pushed to those speed, R-17 is a one of a kind powder for extra velocity with heavy bullets in the 308... JP.
In YOUR rifle. Its way over book value and what quickload recommends. Think about it, before you get some rookie blow up.