I don't know how you call it a "Browning" when it has a "Sako" Action. Usually the brand of the action, is the brand of the gun, even if it's a custom gun. But as to twist----
Take out your cleaning rod and a couple of patches, and measure the twist rate yourself. Once the rod with patches is snug in the barrel, it will rotate with the grooves in the barrel. Take a piece of scotch tape and put it on the rod like a flag. When you pull or push the rod in the barrel, the flag will rotate. After it makes one full rotation, the rod should either be so many inches in or out from your starting point. The number of inches is your rate-----1 rotation in 9" or 10" or 12"