Lube Recipes using Mutton Tallow

[Caprock]

here is a recipe that proved successful.
75 gm ozokerite
75 gm tallow
62 gm copha
150 ml caster oil
12 gm vaseline.
this lube had the least leading in a certain barrel of any lubes by a long chalk.
the piece of paper with the recipe on sits on top of the lube and has some oil staining, so there is either too much caster, or another oil might be better.
ozokerite seems to carry more ingredients than beeswax.
old charly dell woild probably roll over in his grave at using vaseline in a bpcr lube, but it worked.
if ever i start making lube again, this is where i will start.
keep safe,
bruce moulds.

What is copha? I googled to no avail.