Concussive Charges deal damage as normal in addition to it's token discarding effect.
https://dl.dropboxusercontent.com/u/30223400/Official.jpg AParks: http://boardgamegeek.com/article/13778074#13778074
Q) If an attack using Concussive Charges is countered with feedback pulse, what happens to the addition effect of the weapon? Are tokens still removed?
A) As long as there is a single hit in the damage pool (after evades etc) then the defending ship is counted as being hit. For Concussive Charges, a token would be removed for each damage result in the damage pool and then 50% of that damage is reflected. e.g. 2 damage = remove 2 tokens and reflect 1 damage.
https://dl.dropboxusercontent.com/u/30223400/Official.jpg AParks: http://boardgamegeek.com/article/15483236#15483236