Be careful with those TAC loads. I tried 45 grains of TAC with the 130 grain TTSX and got over 3,100 fps. I stopped there. 49 grains would be too hot in my rifle. My two 308 bolt guns are a Tikka T-3 and a Savage Axis. Barrel lengths are almost identical. The Axis gives me 100 fps more velocity with the same load.
Again, in the Axis 308, 42 grains of TAC with a 150 grain bullet gives me 2,725 fps. The Tikka is in the 2,500 fps range, about 150 fps slower.
