Howdy, folks... new to the forum. I'm L1 and going for L2 and I'm trying dual deployment for the first time. Only ground testing so far and have mixed results. Basically if I try the calculated amount of BP on an empty bay, it shears the pins and ejects the nose cone quite forcefully. If I pack my parachute in there, the charge detonates but no shear, even at twice the amount. I've tried this several times now with consistent results. Now, my instinct suggests that partially filling the volume to be pressurized would result in higher pressure and stronger ejection, not weaker, so I'm wondering if someone can explain why this might be happening? It's not like I have the chute jammed in there or something. It's the same setup I've used successfully on engine-based ejections numerous times. Thanks.