I used to fly my BT-50 based Astron Sprint on B4-6's, B14-7's, and C6-7's all the time and never lost it. With a C6-7 it went higher than the "factory extimated" 1600' as well. Streamers make for easy low-drift high altitude recovery. I don't use chutes in any "standard/non sci-fi" rockets under BT-60 standard-wall (non HPR) tubing size.
A streamer in a Cherokee-D equals recovery on a D12-7. With the insane 18" factory chute it is a loss unless in calm conditions.

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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, and HAVOC !