Does anyone know what the differences are on the Lot #'s of the 5.56 XM193 ammo?  Specifically I am wondering which lots were sealed for moisture protection.  I am looking to order some of this ammo and some of the lots available are # 20-23, 30-34 and lot # 6.  Was there ever any difference in the QC of the Lots or are they pretty much the same.  
I assume that the higher the lot number, the newer the production year.  Is this correct?  Is there any difference between the white box and the brown box?  Which lot number would you personaly purchase?  
I appreciate any answers you might have.    

I have read here before that lot #6 may have some sealant issues. Also as has been stated here before it should make no difference if you're not planning to take your weapon and ammo into water. If you're a SEAL I would avoid it. Of course if you were a SEAL you wouldn't be asking this question here now would ya?

Shabo