It will be nice if the two barrel version could each one be configured to hit not in the same place..
The shells are guided... and there is no reason to even fire both barrels if the target doesn't require it.
The two guns are there to increase the rate of fire, not to get two shells on target.
with about ~20 meter distance if they desire , that will significantly allow the artillery to cover wider area about twice of it in about same time.
If you want area coverage then use Smerch. The Koalition is for area targets and point targets. For area targets non guided shells could be used.
But if both barrels hit nearly the same place it will be wasted ammo.. in the case it hits nothing or that is over kill for the target is seeking to destroy.
Two shells hitting a building or bunker or wall will not be twice as effective but will be an improvement with regard to effect.
A modern tank can be disabled with just one hit.
probably true but two guided shells coming in at nearly the same time might improve the chances of penetrating APS system defences for example.
If the target is a line of trenches then delayed fuses with the shells burying themselves in the ground near the trench before exploding would be devastating to the trench line... two shells even more so.
Garry what makes you think a single-barrel Koalition would be only to able squeeze a measly 6 (or 8 for that matter) shells for simultaneous impact?
Not many targets would justify more shells. An enemy unit caught in the open, 8 shells all using GLONASS guidance to space their detonation points with airbursts at say... 3 metres above the ground and a very large area becomes a killing ground.
Just looking at video footage from Afghanistan with the British forces there and it is all open and exposed with very few places to hide or dig in... even just 4 x 40kg HE Frag shells would be devastating.
A human operator loading powder charges separately would leave them outside the armored capsule (and the vehicle for that matter) and within close proximity of the thinly armored ammo storage area.
There are no human charge loaders. The mechanism is fully automatic with a belt feed from each side loading shells and propellent charges.
I agree, based on your premises that a higher rate of fire would be likely, but then an F-16 can carry a max payload of 7 tons. It is a question of need.
I very much doubt a battery of Koalition vehicles would need to fire 20 rounds... the vast majority of the time it will be a few rounds to hit a few specific targets.
Obviously when the targets location is not know exactly a salvo of dumb unguided shells might make a 20 round volley useful, but in such circumstances I think rocket artillery would be more effective.