Wes:

Are you sure the scale you're using is telling the truth? I have an inexpensive WalMart fish scale, but it's fairly accurate- only a half pound "optimistic" (high, as it's a fish scale) at 10 pounds. It said my Camel weighed 10.5, so in reality it's 10.

I have a Magnum 91 2S, a 2200 mAh battery and the one pound block of lead in mine. I can't imagine what you might have added that could weigh more.