I've been watching this powder for a while. I have a 25-06 Sendero SFII. That 26 inch barrel ought to be giving me 3450ish velocities using Barnes 100s with decent accuracy, Instead, no matter what I try, it likes to throw 2 and one when it gets above about 3230. It doesn't seem Picky at all at about 3230, other than seating depth. Hit seating depth and 3230 and it'll shoot sub inch.

I think 26 might be my last attempt before I surrender. Alliant data shows ~3350 with 24 inch barrels and other 100 grainers. The Barnes tend to go a little faster so I hope to manage Alliant numbers anyway + a little something for those extra 2 inches of barrel. 17 and 22 gave me better numbers without pressure at 70 degree temps. 4451 is on the short list to try in this rifle too, but I have less hope for much extra speed out of it.