I wonder... They use a flash supressed version of Reloader 15 for M118LR, could this be it? Might be worth trying later this year. I have room for another pound on the shelf.
Sounds good but was this info out for the RL-15, too? What are the velocity differences in those same temps for RL-15? I'd be interested in seeing what they come up with for .243 win. Using 4064 now with very little velocity changes in a range of temps but it meters like shit.