# PoudreB - JB Notes + PR 07/11/2025 The 6th batch was made last year, around August.   The only changes from the patent process and my previous batches were- 1.  Instead of spray coating the NC lacquer, it was incorporated into the propellant by pouring a portion of the lacquer into a 8x14 Pyrex flat dish, then sprinkling the thoroughly dried granules into the lacquer and mixing using a plastic card. 2.  Instead of using WC-860 pull down smokeless as the NC source, I used Bullseye for this batch. I deemed after 5 batches it was time to try a double- base powder as that portion.  If you are not familiar with WC-860, it's a slow burning single base ball propellant used for the M2 .50 Browning. --- PR 07/11/2025 4:29 PM There are two no debates in the patent - you must remove excess AN from the pre-mix granules using a quick water soak.  Yes you will have reduced yield, but if you don't do this you will have unreliable propellant.   The AN must be completely encapsulated by NC to be water proof You must achieve 1.2-1.8% b.w. aluminum powder content (dispersed into the lacquer) for reliable ignition. I found out the hard way, batch #4 came out at 0.8% because I thought my memory was accurate, failed to review my notes.   It was easy enough to fix. --- PR 07/06/2025 9:24 PM Very flexible recipe.   IMO this patent is over-looked, this is a hybrid propellant and not in the same class as a BP substitute.   There is almost no residue.   It's non-corrosive and works quite well in gas operated weapons.   I will continue to document and share results as I learn more. Any NO2 evolves from heat and degradation of the propellant will be caught and neutralized. Camphor has the same properties.   It's inclusion in PoudreB is interesting, as it also repels moisture FA-70 WW2 era primer, re-vamped served with PoudreB batch number 9 https://youtu.be/5H15pLNLI3w?si=ww9KbItxOsl5y9IF ### Mesh to Micron Chart [[Mesh to Micron Chart]]