The most temperature sensitive powder I've ever seen is why I have no use for it. There are just better more temperature tolerant powders available that do the same thing IME....
WOW that's a bit over the top IMO, I have used it for years without any problems, have seen many more temp sensitive powders than RL19.
Is more uniform from lot to lot than its big brothers RL22 & RL25
It's just experience over multiple cartridges. Use whatever you want, won't bother me...
For example, just in the 7-08, I've had two loads multiple years apart with different lots lose over 150 fps from 100 or so degrees down to 20's. A 139 Interlock load went from 2800+ to 2640 and impact was way off at 200 yards. Bringing out the Chrono with my camp in the truck to check speed was fun. When your crap is jacked the day before a big hunt, it's not cool. Just simply not worth taking the chance in this day in age...
H414, H335 and RL-15 are also not very good in the hot to cold department but 95% of folks will never know anyway. .
