This was a 1 pounder with a 2.5 inch round shell. Filled with Green Veline's formula stars. It had BP coated corn husks for burst with .5g flash in the center. The passfire was 1/8" green visco into the shell with a straw filled with 80 mesh BP leading to the center. It acted like an morter once launched! Shot the shell up to about 150 feet! RP for the propelent, slow BP delay on top, but no bulkhead, then 10 mesh BP to light the shell fuse, that had slurry primed visco, 1" length outside. This is the second one that has launched itself, after fireing! Thoughts?