Bench bleeding a new Master

I just picked up a new master cylinder and need to bench bleed it. It came with plugs to plug the ports and instructions saying to just screw the plugs in and (with the top on) depress the piston multiple times until there is only about 1/8" of travel. I've never bench bled a master cylinder like this. Does this method actually work??? Typically I've just rigged up some short clear plastic lines to bleed the air out. Thanks!!