I haven't used in in a WM, but it gets tremendous velocities in my 30/375 S.I. which has a little more capacity than the WM (96.4 grains) I also use it in my 6.5 SS and 6.5 Sherman with the 150-160 grain bullets. The only question I have at this point is how much does temp affect it? I have heard varying opinions about it, but the consensus is, it isn't as good as the Hodgdon powders. For comparison with the WM, I have exceeded 3100' with the 230 OTM in a 26" barrel with my 30/375 S.I.