EddyBo,
What cartridge/bullet combos have you used H1000 in?
In general, temperature resistance "works" better when a powder is used in an application especially suited to its burn rate. Usually this means where the case is full or nearly full when full velocity potential AND pressure level are reached. I don't use a lot of H1000, but have had very good luck with it's temp-resistance in the 6.5-06 with heavier bullets, where the powder charges fit the criteria I just outlined. But I wouldn't expect it to act exactly the same way in the .264 Winchester Magnum with 140's.
338 Edge, 338 Rum, 300WM, 338 Lapua 7RUM tried it several times and several different lots. My issue was always groups would be spectacular one day, crap the next. I dunno if it was temp or humidity swings but something would bring it out of tune. I was also in the group of guys who got one of their fast lots of powder. Like having to back off 4 grains to get back in tune with just a change from one jug to the next. My issues left a bad taste in my mouth for H1000.
