My rifle loved RL22 equally as well as Retumbo, and they were both very accurate with the obvious velocity advantage to Retumbo and the 72g load. I never tried Rl26 or any of the others you listed DF, sorry I can't help more with that. Where I hunt I've never particularly worrled about the temp sensitivity issues (if any) with RL22. I do like Fed 215M primers best.
