On a dry, uncontaminated runway that is true Standby Rud.
However, on a wet / contaminated runway even if you select MAX brakes the
autobrake system can only provide the level of deceleration that the Anti-Skid system can provide, if that is short of the preprogrammed deceleration rate before the wheels skid that is what you will get.
In this case reverse certainly will 'help' and may allow you to achieve 'actual'
MAX braking.