2 questions, one serious, one not:
"Next was the water test, this is shoot three rapid shots, the third round just pull back the bolt enough for the empty case to clear the chamber, not eject, then close the bolt on the empty round, then wait at least one minute, eject the empty, insert the fourth round and fire."
1) What is the point of this procedure? If you need to wait, why not either chamber a fresh one and wait, or just leave the expended case in the chamber and wait, before reloading and shooting? Why partially open bolt, then close with empty case in it?
2) Is there enough water in the bore to set off dowsing rods?