Matt, I think all the Extreme powders are extruded. H380 is a ball type.

FWIW, most double-based powders are GENERALLY more sensitive than single-based. Exceptions certainly exist, but the sphericals and some others, notably the 500 series Viht powders wobble a bit more. WW 748 is about the worst for this.

My experience also includes surplus 4895 and WW 296, both of which lose MANY hundreds of feet per second in .30 cal and .44 mag repectively when it gets cold. I've gone to 4064 and 4227 for winter uses.

Redial

I talked to a tech at hodgdons yesterday.He informed me that if you let the ammo get exposed to extreme temp differences,there could be as much as a 200 fps diff in a 22/250 between stick and ball powders.This would not only effect trajectory but also left right.He told me that when he hunts coyotes,their usually 200 yrds +,so he uses his gun as a single shot,in other words,pulls one out of his inner shirt pocket when required.He uses H380,finds his gun prefers it.He says even if I were using the less sensitive varget that I do that anyway,so ammo that makes many trips out without use is not subject to hot cold hot cold.He says that would be just as bad as the H380 seeing cold.