Which other abilities' scatter are most similar to this ones? So we can get an idea of how accurate the barrage is.
Because the replay shows some consistent shot grouping, I'm sure you'd agree.
A very interesting questions, I have to say I did not watch the replay.
MMX can provide you with better stat on this matter and you can also check his tools scatter this.
What is more improtant is the combination of scatter/damage/AOE
Will provide you with some stat from Sereal but they do not provide as good a picture as MMX tool:
G-530 Concrete Piercing Round
Damage 240
Scatter
Scatter angle 0
Distance offset 0.5
Distance ratio 0.1
Distance max 0
AOE Radius 6
Distance near 1.25
Distance mid 2.75
Distance far 4.5
JT supporting Fire
Scatter
Damage 160
Scatter angle 8
Distance offset 0
Distance ratio 0.0672
Distance max 10
AOE Radius 4.5
Distance near 0.5
Distance mid 1.5
Distance far 3.5
Brumbar barrage shot with scatter
Damage 160
Scatter
Scatter angle 9
Distance offset 0
Distance ratio 1
Distance max 8
AOE Radius 6
Distance near 0.625
Distance mid 1.25
Distance far 6
Fragmentation shell
AOE of 8.
AOE damage 1/0.5/0.2
AOE distance 0.15/2/8
Deals 120 damage
(I guess it has no scatter either)
One can note that Concrete round has little scatter (it is single 240damge shell thou), brumbar has slightly more but on the other hand it has better AOE and less range.
(don't have the number for the dozer but is 5 shell 70 range with scatter probably comparable to brumbar)