I had a .264 WM barrel put on a Ruger #1 about 28 years ago. This was before there were all the current 6.5s obviously. I shot it this year and it still shoots small groups with Hornady 140g SP. Would I have picked the .264 if the others were available then I don't know, but I do know I have a lot of brass and good loads for it so will stick with it until I shoot it out.
