I've heard a lot of whore stories about temp sensitivity too.... but haven't seen it in the field. Note the Winny magnum primer in the listed load... I believe that has a lot to do with my lack of temp issues with W760/H414 (along with RE15/17/19/22).
Short answer: no, I've not run the load over the chrony in a veritable cornucopia of ambient temps. I game, however, shot many pounds of 760/414 with nary a notable issue afield.
