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I’m getting 2984 fps with 208s and 2217 in my 26” .300 Win Mag. That said, it’s using a lot more powder than some of the WSM loads mentioned here.

Blimey - that’s fast.
Have you measured head expansion?

I’m working up a 7RM load with 180s and RE26, so will be good to see how that goes. Haven’t pushed it hard yet, but already into mid-2800s...