I don't recommend any of the LBT bullets lubes for black powder use, yet, as the above report states, some are very happy with it's performance. So try it, and if it outperforms others, use it. Based on customer reports it works better than anything with the black powder substitutes.
The two top performers with real black powder, this based on customer reports, are Lightening lube and Wonder lube, or Natural lube. The latter is available from most gun shops if they offer black powder goodies. I've no idea how one finds lightening lube.