OK
Tom

For cold weather hunting, that is, hunting in freezing weather, I switched to both track's mink oil on pre-lubed patches as well as Neetsfoot oil
- the 100% stuff, not the Neetsfood Oil Compound, which is a synthetic. Mind you, I've never tried the compound so don't know if it would work
or not - this is simply a 50 year old warning from magazine/digests.

Neetsfoot oil will remain a liquid to lower temps than the mink oil, but putting a lubed mink-oil patch between your fingers instantly softens it.
I found both of these shoot to the sights (set up for them) in the summer time, in my 14 bore rifle. I am quite lucky, in that that rifle shoots to
the same poi summer and winter, no matter the lube used. My sights, adjusted in 1986 when we Taylor build the rifle and I finished it, finish
and sighting, have never been adjusted, never needed it.
I have heard some strange phenomenon happening with Bore Butter, as to building up in the bore and needed really strong "stuff" to dissolve it.
I have left my hunting rifle loaded with Neetsfoot Oil loaded for 3 months (poor hunting that year) & when touching it off, it made the f1st shot in
a 2" 5 shot group off the bags at 100 meters.
It works for me and many others.

Mink oil, when used in my little .32 for a day's shooting, mind you it was only -5, the 50th shot loaded easier than the first. No wiping.
It does as well in the larger calibres too. Many guys find the little guns foul badly - for some reason, I don't. Ball/patch combinations that fit with
compression in the bottom of the grooves are that reason.
Too - patches are saturated with lube, the excess squeezed out, but gently. They are still wet with lube.
If you want, you can load a barrier between the patched ball and powder - a card wad comes to mind. That is what I used initially, then discarded
that method as not really necessary.

Good luck.

Yes - Bear Oil is very good. The oil I have stays liquid to very cold temps. I have a mix of oil and lard, that remains quite soft and gooey at the same temps.
If the bear oil is tried out at low temp, as in a double boiler, the oil content will be very high in comparrison and this will remain liquid to lower temps.
The higher temps used, will create more of a "shortening", a thicker mixture.