I would assume it is Varget: Varget is an "Extreme" and as far as I know those are all ADI single-base powders. Re15 is a double based powder, though I don't know how much nitroglycerin it contains in comparison to powders like H335 and W296. I think it's pretty much accepted as common knowledge that double based powders react to temperature change more than single based powders.

Don't be the darkness.

America will perish while those who should be standing guard are satisfying their lusts.