DSII - Troops Dug in?

Well here is something that is very confusing. The rules for dug in infantry
are a little confusing. They are clear when it comes to artillery fire and
infantry fire, but what about vehicles? I would hotly

debate debat that an autocannon is less effective than a DFFG against a

bunker/Duging position? A larger ball of super hot material striking the

ground would cause a rather large explosion! Maybe I am confused?

> infantry are a little confusing. They are clear when it comes to

I think the point is that the DFFG explosion is essentially in the vector away
from the firer, makes a really nice spread but the infantry are already dug in
behind berms, in trenches and in foxholes and so the primarily shrapnel damage
the DFFG does is avoided.