It's been a long road but the barrel on my 264WM has finally given up the ghost. It was my first rifle and is still my favorite. It's going to the smith next month for a new tube. I'm leaning toward leaving it a 264WM but I have been toying with the thought of more horsepower. A 6.5/7MM Dakota or a 6.5 STW sounds interesting to me but I'm unsure of the return I would see with the added powder capacity as I am aware that the 264WM is already fairly overbore. What do you guys think? Should I shoot for a 6.5 "Super Magnum" or would any negative effects like further reduced barrel life outweigh the increased velocity?