I posted this to the Yahoo groups but I will post it here also.

The way I play it, is as the rule says in the book.  You can reroll each die "(once)", so if you roll 3 dice and get 2 hits and one miss, you reroll the missed die separately and get a hit.  From now on, you roll the dice in 2 groups "unmissed dice" and "missed dice".  From now on die in the "unmissed" group either hits or gets transferred to the "missed" group upon the first throw of each repeat.  Next throw the "missed" group and let attrition take care of them.

This way each die gets its "ONE" reroll.

Jimmy