I'll be real interested to hear your results.
If they're consistent with the drop, I'd definitely contact Hodgdon. In my experience they're great people who are concerned about their products.
The chemical and physical compensation in powders for colder temperatures has been explored on the Campfire in the past couple of years. Let's just say that it DOES work, but as I noted in my earlier post, powders do vary from lot to lot. Dober mentioned the bad batch of RL-22 that got out about a decade ago. It was actually closer to Rl-19 in burning rate--and it was recalled. I've also seen considerable variations when a commercial powder was formulated to replace a mil-surp powder--and not just with the old H4831.
