Natrelle 68mp Saline Overfilled for 330 Cc Bag??

If your surgeon is suggesting filling the implant it may be a good opetion, however, you should wait for the final result of the augmentation before revising anything.

I would agree with the recommendation of your surgeon and would have you wait a few months to allow for swelling to reside and to let the implants settle.  After that, he/she can decide if you need to differentially fill the implants to adjust for pre-existing asymmetry. 

A recent study looked at a large group of women's breasts and noted that a majority had some degree of asymmetry.  As such, it is not uncommon after surgery to notice pre-existing asymmetry especially if both implants are filled with the same amount of volume. 

I hope that helps!

Overfilling of saline implants is common and usually around 10% of the baseline fill volume. If you fill more than 10%, the implants become firmer and more "roundish." If you need significantly more volume, placing an implant with a larger base volume makes sense. Filling beyond the maximum volume indicated on the implant may violate the warranty of the implant from the manufacturer. Regardless, I agree with waiting 3 months to see how everything settles as you may simply have more swelling on the apparent larger breast.