just picked up this game today, will be testing on my Sleeper with the multi game code. All signs point to this one as a possible reload preset if anything so far I'm about 1 hour in.
You can do a fast reload glitch on this game. It is done by clicking the right stick(melee) right as you pull the empty magazine out. It seems like the cod glitch but with the right stick instead of the y button.
the guns in boarderlands are calibrated to fire at the single, semi auto, and full auto per pull of the trigger
if the weapon is a single action or a semi auto and has a high enough rate of fire the rapid fire mods work, if they dont have a high rate of fire you still have to wait for them to fire
the game limits fire rate of a weapon not the amount of trigger pulls as in some other games