those heavy gun particle stress is also known from SH3 when using a 16 or 20km admosphere mod together with high gun range settings in sim.cfg.
at least those AA-Gun range setting in sim.cfg are simply to much for some systems (by the way the original vanilla value is 1500, now it is 3500 !)
i will instandly reduce these AA gun range and will also modify the almost instandly deadly enemy normal gun error angel to have a bit more spread