After loading a save or entering a new map, any bonuses to firearms reload speed are not being applied, until the gun in question as been fired once and reloaded using standard reload speed.
E.g.: You load a save, fire a pistol at an opponent, reload once at unmodified speed, fire and then reload quickly for the rest of the combat. If you are using dual-wield pistols, both guns are reloaded once at standard speed before any buffs kick in.
Verified client cash, no errors found. This bug was present both in 1.0 and 1.1 beta.