Jeff, I have been thinking about getting a 325 WSM.
How much FPS do you lose with the shorter barrel BLR ?
Uh... I should know that, but I kind of stopped setting my chrony up because it was messing with my head!
I don't remember ever shooting the two rifles over it at the same time, which would be the real test because reported velocities do seem to vary a little from setup to setup, with my chrony.
ANYWAY, that said, it's certainly not more than 50 fps difference, if that.
-jeff