Please note, that some guys feel they get some brown residue resulting from the castor oil when it burns. In my bores and my bro's barrels as well, this hasn't happened.
: Although it is more costly, LehighValley lube as sold at www.trackofthewolf.com and other places, is the very best of any lubes I've used in 35 years of shooting muzzleloaders. Pathces lubed and stored in sealed containers remain ready for use over several months, however, if not air tight, the lube will evapourate, requiring replenishing. I find this a small price to pay for a superior product.