Have used H100V in a variety of cartridges for awhile now. For example, the 243, 7mm-08, 257R, 6mmRem, 7x57, 30-06, and 6.5x55. Chuckle, even tried it in .308, with decent results, after a fellow range member ran it thru his Sierra quick load program for me. Probably have used at least 8 lbs of it. Like jlsbassman, live in Tx, so warm to hot much of the time when shooting. So, can't comment on its temperature sensitivity. Results for accuracy varied, but generally satisfied enough to pursue trying it. Liked the way it metered and Hodgdon has load data for quite a variety of cartridges with it. Besides, price of it is generally lower than other Hodgdon powders I might possibly use.
Gave some H100V to another retired range member to try. He's much more methodical in his reloading and owns better shooting rifles than me. What cartridge(s?) he tried it in, I do not know. But, he was impressed with it enough to recommend it to another serious shooter he'd known for a long time. Other guy tried it and his comment was, "why haven't we heard about this powder before?" He too, was impressed with it. Now, the first guy will stop using H100V due to the powder leaving a hard to remove black coating on neck of his fired brass. I too have this problem, but it doesn't bother me as much as it did him.