[4runnerman]

tobnpr- Yes it does. I get to range in morning at 5 AM,maybe low 50's and leave around 1 or 1:30 Could be as hot as 85 by then. My MV stays the same. I shoot 5 rounds,Clean Barrel, have a sip of pop,pick up brass,text the wife,chat, and then shoot 5 more. MV stays the same. I tried Varget in 308 and went right back to RL-15. I also try to stay with RL-15 in my 6mmbr for matches also. As of latley it has been very hard to find. I will switch to varget in the BR if I have to,but the 308 is RL-15 only.
RL-15 is not temp sensative.
Will my MV change at -30, Yes I am sre it would somewhat, Maybe I should re-word my phrase to- At any given temp,my loads will be with in 10FPS of each other, and not list the MV. I just know in summer ( when I shoot ) It is 2640 to 2648 FPS. My point was-To get loads with in 10 FPS is the norm.