>>531573572
>>531573798
The flash is not an indicator for max charge. The charge meter has to max out and start going fuzzy like the railguns and the fuel.. rod? things have to be fully depressed. Firing at the moment of the flash will only get you the lower power, very inaccurate shot.
Here's a webm demonstrating this with the difference in explosion size and effect being a clear indicator of a charged and uncharged shot.