I had little luck with mine that I made in the same method as a particular "Reproduction" guy's videos. I took videos of my 4f versus commercial, burning a 2gr charge, and the frame count showed mine burned at almost half the speed. Using my 2f or 3f for a main charge in my 40, it regularly burned through patches. It also had horrible velocity spreads, maybe from burning the patches, maybe from it being so fluffy that it's hard to compress consistently. I was able to get more shots in without stopping to clean than with Scuetzen though, like almost indefinite. So overall, I won't bother using it for priming, but for the main charge it's usable for woods walks or plinking, and I'm glad to at least have it available.