bdan that looks like a good one. Hows the accuracy? That one looks safe as Alliant lists up to 60.8 with a 150 but some of the Berger data is strait from Quickload and if the data is not calibrated with known loads it can be way off. This is especially true for R26. Quickload uses a burn rate slower than R25 which a closed canister detonation test or however they test these things could produce. But in a rifle cartridge it is a different story and R26 is closer to 7828 or H1000 and right between R22 and R25 sometimes acting like H4831 depending on case size and load.

That 26 inch barrel velocity I doubt if I could gain much more than 50 fps in the WSM even running R26. In my current load of 69 grs. it is just breaking 3200 fps and some change.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli