thanks for the insight! I tried it and was able to replicate what you were talking about
I was able to reproduce in armor damage: 750, 1499, 2248, 2997, 3746, (4495), 5244, and the maximum reproducible armor damage of 5993 as stated on weapon's description on the titan Alpha's shoulder in testing grounds, although it seems extremely difficult to realistically hit these higher numbers especially the maximum 5995 armor damage, especially in real game.
additionally, based on how this projectile works, it also seems to do even worse on robot modules due to their smaller module sizes and the size of the shatter's projectile. it seems to cap out at 2997 armor damage on a defender bot's shoulder in testing grounds (I was able to get 3746 once at a certain angle, but I wasn't able to replicate or record it).
It seems each scatter shot produces 8 sonic projectiles, each dealing roughly ~749 armor damage or ~480 shield damage at level 1. Unlike most of the other BLAST weapons, scatter does not do any splash damage. Its damage is capped at its stated weapon stats per shot, but can often be limited by various factors including distance, target surface area (smaller bots would take less focused damage than bigger titans), trajectory angle (aiming from the front, side, above), target protrusions (aiming for shoulder, but it also hits the leg), etc.
@ruby crow