Well, I looked at it for the 100gr partition in .264WM since it was a top velocity option. 70.3gr was a velocity node at 3440 ft/s with no more than 10 ft/s variation in mean between 70.0gr and 70.6gr. Velocity SD at 70.3gr was 4 ft/s. This was all done between 60 and 70 degrees F.
With the temp chamber, 140F gave 3620ft/s and a sticky bolt. The strain gauge estimated 65 KPSI. Only one shot was fired. 0F gave 3315 ft/s and a 45 ft/s standard deviation.
Variation over the whole temp range was 2.2 ft/s per degree which is about as bad as it gets.
That's consistent with industry data and everyone I know who's looked at RL-26 serious. It's useless for any application I have.
