Formula says to use Atomized Aluminum dust…so I picked 400 mesh. Could obviously pick 325 mesh, if so chose.
This is also a BP RPH (“Rocket Propellant Hotter” which is a rocket mixture formula) which you also include rice with. If used for rockets, you only use for rockets up to 1/2″ and they must have a large nozzle (>1/3 ID) and the spindle should not be longer than about 2-1/2″, if you use this mixture.
