Throwing mods for a berserker will increase the dmg done by volley dmg.
A few berserkers will give up the better bp's and qvic gloves (20% throwing dmg increase) to use time bp(15% throwing dmg increase) and Anguish quest gloves (+25 to freenzy damage)
A year ago sully was right with the throwing damage being no good and it was 20% of the dmg, however with Dragons of Norrath the volley skill was linked directly to throwing skill making skill mods HUGE.