i have been testing 3 different bullet lubes for black powder loads in my buff classic. the first was my home made lube it keeps fowling soft does not melt when the weather gets worm but i got a little bit of leading,the second lube was spg lube very good results soft fowling no leading with the black powder loads but tends to melt when the weather gets worm. the third is rooster red black powder 7.this lube is by far the best i have used,it keeps the fowling far softer than my lube or spg ,it has a melt temp of 210 degrees and is just as good with smokeless loads at 1500 to 1600 fps with no leading.spg sells for us$3.59 a stick at track of the wolf rooster red bp 7 sells for $2.95 a stick.so you guys that cast your on bullets and by your lube give rooster red bp7 a try you wont be disappointed.the tests were done over a 6 months of testing in all temperatures here in west australia