I use SPG as lubricant-fouling softener when shooting muzzleloading rifle and percussion revolver conical bullets, and 45 Colt bullets with muzzle velocities less than 1100 fps (Titegroup® loads).
I want to try patched round balls in my rifle.* Among lubricants I want to try is SPG. Without being able to confirm it, I'm anticipating SPG will be less satisfactory than less viscus lubes. But if it works well during testing with it unaltered, saturating a pillow ticking or linen patch will become expensive because I would be using much more than necessary.
SPG is made using 100 percent natural materials. What do I add to it when heated to a liquid state to increase its liquidity during use at temperature as low as 20 degrees Fahrenheit? If altitude during use is important, I'll be using it as high as 5500 ft.
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*Perhaps the main reason for investigating patch lubricants is that I'll also be trying round balls that I have dimpled using "The Dimpler." Any advantage gained by texturing RB's surface might be negated - as in "filled" - by too thick patch lube.