No need to. There is a small button like thingy you depress and shuck and jive the shells out. It is usually on the butt end of the trigger guard, left side IIRC.I remember reading some years ago about one of Mossberg's shotguns (going off old memory cells here) that you could hold the trigger down and cycle the forearm and pump rounds out.
What model was that?
Will the 590A1 do it?