That would be too verbose and is mainly of interest to weapon tweakers:
Fire modes aided by the High-Explosives skill are either straight-line, high damage, long range explosive shots or medium damage, medium range shots or throws over obstacles, using explosive charges.
--Bandobras 11:47, 16 July 2006 (CEST)
Code suggests a connection of this skill with the mind attribute, though I guess the connection is quite weak. --Bandobras 15:34, 10 September 2006 (CEST)