Gato Feo #1 is touted as a 19th century NRA lube that can be used for black or white powders, for lubed muzzleloader patches or lubed grooved cartridge bullets. Homemade and easy to make, I've been making and using it for decades for both applications.
By weight and melted double boiler style ...
1 part mutton tallow (dixie gun works)
1 part canning wax (gulf)
1/2 part beeswax (filtered)
Works fine as is for Summer or Winter, but the viscosity can be tweaked ...
To make the lube softer (decrease viscosity):
Increase the ratio of tallow (or lanolin): Since the original Gato Feo formula heavily relies on these ingredients alongside beeswax, increasing the fat content will naturally soften the mixture.
To make the lube stiffer (increase viscosity):
Add more beeswax: Beeswax is a primary stiffening agent in many homemade lubes. Melting in additional beeswax will raise the melting point and increase the overall stiffness.