Or, more real world.... You're a -60S HAC and have a training flight scheduled out of North Island or Oceana. Your DH tells you there are 13,500 rounds of 50 cal NCEA that the squadron hasn't shot for the year that expire that very day. You are to expend all ammo in your 2 hr flight with a single barrel. What do you do?
New barrel? Shoot it out and throw the other 3,500 rounds overboard in the range. Bam. Expired ammo gone and NCEA expended.