When I used my 401 for timed events I found I could reload it faster than most people could reload their break-barrels. There is a technique to opening the tap, which is not to turn it like twisting a knob, but to apply pressure with the thumb in a forward and slightly downward direction, this causes it to snap open. Its a bit like the action of popping a bottle top off a bottle. And it works fine in cold weather! I think they were trying to keep the costs down, hence the knurled tap rather than a lever, and the use of rather ugly stampings for the trigger-guard.
atb
Alistair