when RL 26 disappeared up here north of the border i started looking for alternatives. Ended up trying Accurate Magpro in a bunch of rifles i was using 26 in. Found it to be quite a good alternative. Not quite as high velocities as 26, but close, have found it to be quite stable from -10C up to 25C so far, i rarely see temps above 25C so couldn't say beyond that. I run a 168 LRX in my 24" 280AI, velocity topped out around 2940fps, and found my accuracy around 2870fps. Been quite pleased with it as an alternative to 26, but given the choice, and considering 26 doesn't seem affected by the small temp swings I see, it would be my first choice.