I load RL17 under moly'd 208 AMax in a 308 Win.
I've noted my velocities run around 2620 fps at 70F, and drop to around 2580 fps at 30F.
Rule of thumb, about 1 fps per degree of temp change.
Shane,
What length barrel are you running and are you seatng at 2.80" or longer?
20.5" Rem varmint bbl. 3.00" OAL, Win brass. Barrel has several thousand rounds through it, so the throat has some wear.
I'm also shooting a new-ish 26" 308 (Rem varmint) it gets to 2675 fps with one grain less powder than the 20.5" uses. I pushed it to 2725 fps but started to get a little ejector smear and backed off a grain to 2675 fps.
RL17 seems to be a great combo in the 308 with 200+ gr bullets.
