[arcticap]

There are shooting patches impregnated with liquid teflon spray that are used by muzzle loading rifle competition shooters. That teflon helps to load very tight patched balls, but it leaves a sticky residue which needs to be swabbed out between every shot or loading becomes progressively more difficult.

I don't know how pure the teflon grease is that you have, or if the grease is primarily another ingredient that carries the teflon or not.
Different powders may react differently with the grease and the heat, and all that anyone can do is to test them for compatibility.

But to be honest with you, the grease sounds like it's pretty thick. I wonder if it could be too thick? If you're going to test it anyway, use the smallest amount possible. You don't want it to cause any obstruction issues if it builds up.