I will most likely build my gun off of the remeington action. Now the question is which action is better. Remington publishes same velocities for the 7mm saum and the 7mm remington mag. The 300 WSM, 300 win mag, and 300 saum all have published velocities within 50 fps. I have always heard the a short action is more accurite than a long action. Any truth to this???