I'm using 8208 with 55gr Speer Gold Dots and 69gr TMK's. I've also used/am using it in 6.5 Grendel, 6mm-204 Ruger, 284 Winchester, and 308.
My data almost never lines up perfectly with Hodgdon/ADI (not just for 8208 either) but so what? Lot to lot variations happen all the time and there's plenty of other variables that will be different between your rifle and Hodgdon's test rig.
I would focus on what on what the speed you're getting in your rifle suggests you should do, rather than spend too long scratching your head over a small disparity.
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