PPC overload of 'mech electrical systems, such as targeting computers and sensors (from simultaneous hits, technically) has been part of several games and fictional elements over the years - I'd thought it was an optional rule somewhere, too, but I haven't found it in my ruleset. Essentially, this electrical overload property made it a lore-friendly hard-counter option, as well as a situational buff to weapons that haven't always been that good (particularly ERPPCs.)
PS: 180m, while canon, was too much range given the system's capabilities in-game. Without the sensor overhaul (which I think they're still planning) allowing for delayed detection times, the fix I personally wanted isn't possible - so it made a lot of sense to restrict the range.
Edited by Void Angel, 27 November 2016 - 09:25 PM.