1st Flight of the MadCow 3" Sport-X.  LOVED the G76G-7 Mojave Green.  Lots of boost and a loud, awesome green flame.  Rocket cruised to ~ 1200ft and deployed chute at Apogee.  All seemed well until I recovered the rocket to find that my nosecone had separated from the payload bay somewhere about the time of deployment.  (No rivets...just masking tape).  I had a vent hole as well.  New nose cone and rivets on the way!  Otherwise an great flight.  No damage to the rocket itself.