This be t' 4th and final recovery component ground test o' me newly completed PML MATRIX rocket prior t' me NARRRRR Level 1 attempt. Well, blow me down! It be determined that 1.25 grams o' GOEX 4F black powder was sufficient t' fully deploy t' main parachute. 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. Aye aye! I used a handheld vaccum pump connected t' t' avionics bay via 1/4" ID tubin' t' trigger t' PerfectFlight MiniAlt WD altimeter. T' same size charge was also used for deployment o' t' drogue chute in t' aft o' t' rocket. T' rocket performed flawlessly.