Do you give your players a copy of their combat chart for rolling their own attack?
I know lots of people do this but I am not one of them. I believe the objective is to speed up combat. Everyone has one copy of every chart they use so there is no page flipping back and forth through Arms Law. The GM only then has to manage the NPCs attacks.
I do something similar with Spell Law so everyone has a copy of their spell lists so the spell casters are not queuing up to get their hands on spell law to see what spell to cast.