Jul 3, 2018 #1 K Ksduckhntr Well-Known Member Joined Jun 18, 2017 Messages 259 i am having a 300 wsm built and the barrel will be a 1/9 twist. It was the barrel i found at a decent price and carbon wrapped. I am hoping to shoot 180 gr and up. Its faster than the normal 1/10 or 1/12 but should be ok right.?