Regarding H380, I never had any issue with temperature sensitivity. Back in those days, I'd never heard of temperature sensitivity, never experienced it in any measurable way, so for practical purposes, it didn't exist: temperature sensitivity hadn't been invented on the internet yet. That's evidence for our propensity to overthink stuff and create problems where there are none.
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Back in the day I had never heard of temp sensitivity either, all I knew is that I could work up a good load with H380 through my chronograph.........add 10 degrees and the bolt locks up. think back then I just called it Chitty powder
