Shooting Curve Flatteners

I am testing my gun in Anti-Surfer Challenge. In the first 5 rounds I just get about %14 - %17 against Dookious. But when he opens his curve flattening. My hit rate falls to %5-%13(It changes continuously). Should a gun tuned against surfers be able to it a curve flattening bot?

I don't know how other bots solve the problem of targeting curve flatteners, but one possible solution would be to create an anti-flattener gun. Such a gun would give guess factors a negative weighing each time they were visited.