After a long drive up to the Dee River Ranch I was greeted by high temperatures and zero wind on the field.  I assembled the motor on the tailgate and hauled the beast out to the pads.  The supplied CTI igniter (which was at least 5 years old) had most of its coating flake away when I took it out the package, but I decided to use it anyway.  The igniter burned but did not light the motor.  Procured a spare and tried again.  Awesome boost, straight and loud off the rail, straight up into a clear blue sky with some high puffy clouds.  Easily tracked the delay grain smoke.  After it finally topped out, saw the apogee event.  Had trouble tracking it up high but eventually someone called out that the main was out?  Picked it up and the main chute was indeed out.  Fortunately the winds at altitude were almost non-existent and the rocket stayed on the field.  It was still a very long slog through a plowed corn field to get to it, and then a long slog back to the truck, but everything was intact.  The main and drogue harnesses were pretty severely tangled.  Looks like the apogee charge separated the airframe with enough force to break the shear pins on the main payload section and the main chute eventually worked free and inflated.  First time this has happened, may need to do some remedial ground testing of the deployment charges.