Brent, I would check out that load you listed. Is that much 748 going to be safe? I would think 65 grains of a slow burning powder sounds right. Not trying to be a know-it-all . . . just sounds like a lot of faster burning powder and potentially high pressure.
you don't sound like a know it all. [img]images/icons/wink.gif[/img] I actually asked him about the same thing too. After looking at some load data on the net, I think it too hot of load myself. Thanks for the heads up.
I just finished a 6.5 WSM on the Remington action, with a 27 inch barrel. The case has 79 gr. of water capacity before fire forming. The throat length is .120,and I will be testing Hornady Amax's as soon as I get to the range. The Reamer has a 35 degree shoulder, and slightly less taper then Sammi specs. Data will be coming soon with H 1000 and Retumbo.
I shoot 135 Wildcats Magnum primers and 66 gr retumbo out of a Ruger#1 28"Smith gain twist 7.5 twist very accurate.I have also used IMR 7828ssc.I suggest using load and powder data for 270WSM and starting data for max loads for safety antil you have worked up a load.You will have to outside turn the necks unless the chamber is cut to no turn specs.especially if you are using 300WSM brass instead of 270WSM brass.