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The powder is very sensative to temps. it's a waste of barrel life $$ to use it.
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I've never experienced any issues with temperature sensitivity with H380. In fact, I've seen just the opposite: Good stability.
In extremely cold weather, you may need a magnum primer for ignition; but that's something nearly all ball powders have to deal with.
Like Crowbeaner, H380 would be in the top 3 powders, if I had to choose only a few "do-all" powders for centerfire rifles. It's a much more predictable powder, than many others I've worked with (and I've had far more excellent results with it).