[bravo whiskey]

I was under the impression that fuses aren’t actually set until the round leaves the tube.

in my 107mm mortar platoon, the rounds had a shotgun shell in the bottom which was set off by a firing pin at the bottom of the tube. if this is the case here the second round would have hit the nose of the first round setting the second round off early

[ltc8k6]

Generally the fuses are not armed until the round exits the tube. There are different methods for doing that.