
@Minimum Rage
"What if the evil-doer is behind a ten foot wall that is, say, ten feet away? The trajectory would be mostly vertical. I would not want to be betting my ass on the accuracy of the delivery."
Hardly vertical.
If you mean the wall is 10 feet away from the firer.
If the weapon isshoulder fired from ,say, five feet above the ground, the projectile only has to be fired at an elevation of 26 degrees and rise 5 feet in it's first 11.2 feet of travel to clear the wall.
If you mean that the wall is 10 feet in front of the evil-doer:
At any reasonable range from the firer, aim the weapon to just clear the wall and it will still explode only a few feet above the evil-doer.