I just finished load development for my 300WM
I'm using Barnes 168gr TTSX. They have been tested to expand down to 1500fps
I'm pushing 3175fps and not even near max loads recommended by Barnes.
At 800yds I'm still at 1135 ft/lbs
And it's shooting sub 1/2 moa
Really happy with it.
Btw I'm using R17