I shoot my full auto AEGs at 400FPS. its the rule in this area.
I shoot my semi auto AEG at 440FPS, thats also the rule in this area.
Off topic: People who says "360~380 FPS is the sweet spot" is completely utter BS. And I will make this absolutely clear to everyone that there is NO such thing as a sweet spot. It won't increase your accuracy going to a lower FPS, this is just bullshit being fed from ill-informed tuners. Evidence proves there is no such thing, no matter what theory says otherwise.
I'm not encouraging noobs to shoot at 400FPS here, just calling out those poor mis-informed fellows. Please do keep using 360~380 FPS guns, it's easier on your mechbox.