Quoting Dark_Ansem, reply 21
do you know what that " SynchronizedTargeting FALSE" does?
It determines whether or not all projectiles have a synchronized target. If it's set to false then your weapon can fire on multiple targets (like starbases can) or your weapon will impact different spots on the target (e.g. some of your lasers may hit the front of the target while others will hit the mid or aft section).
That's my understanding of it at least, true means that all weapon particles hit the same specific point, thus eliminating any possible multi targetting. The other thread you were posting in (https://forums.sinsofasolarempire.com/442694/page/2/#3436831) had much better information than I can provide, or so I would expect.
From a graphical standpoint, each individual shot will pick random a meshpoint to strike while this is FALSE, whereas all shots will attempt to strike the exact same meshpoint while it is TRUE.