If you have to use hard lube, Gray's #24 is tops. (Look at what the top cast bullet benchrest guys are using.) Second is LBT blue IMHO. But for what you're talking about the SPG will work just fine, and a darn sight better than regular commercial hard lubes. Myself, I mostly use Emmert's lube for stuff like you mention. (Crisco, beeswax, and castor oil.) Cheap and works great!