350 damage over 3 rounds is 'bad' due to 'basic math' (pinpoint 350 damage, BTW, shot from well beyond visual range.
But 400 damage over the same 3 rounds is legit.
The top value, BTW, is the same as unloading an AC/20 over those same 3 rounds.
50 points of damage is significant.
Currently I believe there are medium mechs that can out damage the Awesome at range using either 3 AC/5s or 2 AC/5s and a LL/PPC as they can fire continuously.