Cold weather? Yuck!! I snow bird these days and don't even go outside when it's 30 something.

But I did shoot a couple of times in Montana in the 20's and it was just fine. If it stiffened up I might have remembered that.

Yes muskets. Pattern F EIC and Fusil.

I think bag balm is petroleum based like a Vaseline. Udderly Smooth appears to perhaps have a lanolin base. Using terms "I think" and "perhaps" means I don't know.

Here is a big selling point for me for Udderly Smooth. I can find it locally in stores (Edmond, OK or Cut Bank,MT), commercial black powder lubes not so easy.

As word of confession, I didn't discover this, rather it was referred by a friend in Central Alberta who uses it exclusively. He uses it in the winter for hunting and in summer to out shoot us all at the Victorian Rifleman Gathering on his farm.