This be t' 4th and final recovery component ground test o' me newly completed PML MATRIX rocket prior t' me NARRRRR Level 1 attempt. It be determined that 1.25 grams o' GOEX 4F black powder be sufficient t' fully deploy t' main parachute. Ya scallywag! T' 3 previous tests showed that 0.4 and 0.5 grams o' powder were insufficient t' dislodge t' nosecone while 0.75 grams did nay fully deploy all t' recovery components. I used a handheld vaccum pump connected t' t' avionics bay via 1/4" ID tubin' t' trigger t' PerfectFlight MiniAlt WD altimeter. Aye aye! T' same size charge was also used for deployment o' t' drogue chute in t' aft o' t' rocket. Arrr! T' rocket performed flawlessly.