Without fuzes, which are only screwed in just before firing, modern artillery shells are really difficult to set off.

If you think about it, the act of firing a shell out of a cannon and sending it miles away is pretty violent, but the shells don’t explode in the cannon.

Without the correct fuzes, the shells won’t even explode when they land.

https://www.quora.com/How-does-an-artillery-projectile-not-explode-and-destroy-the-artillery-that-fired-it

I got you fam