RL 26 Temperature Stability?

RL 26 is my go-to powder in my 8mm Rem Mag. around 3050 with the 220 A-Frame, and
nice tight groups.
It would probably be good in the 257 Weatherby, but I have a very respectable load in
it already, using IMR 7977. Dave.
 
From what I’ve read on another forum, guys say it’s stable until the temp goes over 85F. Got a 8 pounder to try in my 6.5 Sherman and a new 284 Win.
 
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