H100V has proven very accurate and fast when I've loaded it in several cartridges. The one downside is that it isn't particularly temp-resistant. In one cold-weather experiment it lost almost 200 fps from 70 to zero F., accuracy wasn't as good, and point of impact shifted a little. The point of impact shift sometimes happens with cold-weather velocity loss and sometimes doesn't, depending on the individual rifle.
I haven't tested any in really warm temperatures, but powders that lose a lot of velocity in cold also tend more at temperatures above 70 as well.
