I am using lymans black gold lube in the groves of the bullet but I think that I need to put a greece cookie behind it as well, I have had great sucess with wonderlube 1000 in muzzle loaders so I will probably give that a go. It seems to be trial and error to get the balance just right, I tried loading to the orignal specification but found that they would hit a man in the chest at 100 yards but that was about it. I am looking for somthing a little more accurate than that.