I used a 24mm F39 reload with the Esres 24-29 adapter. The reload was several years old, so I wasn't sure if it would light and/or produce its full thrust. I needn't have worried as it launched with no issues. However. there was an issue after motor burn out> I thought I had drilled the delay to 6 seconds, but that time came and went and by then the rocket was picking up speed coming down at about a 45 degree angle. Fortunately, it blew the chute when it was bout 30' off the ground. The was no damage other than a zipper about a half inch long.