Fellas, am getting the urge to try out some new powders in my GS. Has anyone tried the new Reloader 10? I queried Alliant and they said they had,t tried it yet, but thought it would be good. Said to just use H322 data. Iwas also wondering if anyone had tried Hodgdon Benchmark. Thought it might give excellent loading density with 400 grain and heavier bullets. Hodgdon has data in their Annual Manual. The people at Alliant would say nothing as to REloader 10 being temperature dependent (thefore, I think that we can assume that it isn't.