I share the common foul taste the dodge rule left among many 'testers' of DH
Dodging a bullet is just ridiculous idea for me and thus I needed to fix it somehow. BUT! I understand a mechanic concept that should resemble a battle-situation in which people stay in cover and pop out just to shoot and in another second seeing enemy aiming at them they hide. That's how I understand this rule really, as a hide and attack shootout between people in covers, in which dodging is reacting to noticed enemy aiming at us, and ducking before he pulls the trigger, rather than seeing an upcomming bullet and jumping like ninja... what is a bit silly.
That's why I allow PCs to dodge only if they are behind cover and the 'barricade' covers at least half of their body(standing behind the corner of the building, standing behind medium-sized vehicle, or crouching behind the crate) and the attack must come from the protected side.
I do however think there are people agile enaugh to jump away from the attacks of types compleetly incompetent at their ballistic skill:
In open space you can dodge a ranged attack if first digit of enemie's ballistic skill x2 matches or is lower than your Agility Bonus - a very skilled 'bladedancer' assasin(Agi 5 6) can outrun an ork boy shootin hiz slugga(Bs 2 5 x2 = 4) , right?
However for every degree of success the attacker has you apply a -10 penalty to your dodge roll.