I just tested taking him down and everything was normal for the first 3-5 minutes. Then all of a sudden, the heli started firing rockets one after the other about a second apart and didn't stop for another 5 minutes until my base was nearly fully destroyed. There was no way I could have taken him down without my God mode.
I do have max heli rockets at 300 and time between rockets to .75, but I always expected this to mean he might fire 4-5 rockets in bursts and have a total of 300 rockets - this way he doesn't run out.
Is this behavior expected? Is there a way in the config to taper these long rocket bursts of 20-30 rockets?