Those catalog delays listed for the Astron Drifter are for long parachute duration, which is what the kit was designed for. Due to it being BT-50 with a boat-tail, if fles quite high for any given impulse level. If you want to recover it closer to the pad on a 12" (NOT 24" chute), use an A8-5, B6-6, B4-6, or C6-7.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !