.999 silver proofs?

I couldn't agree more jbuck, Nothing I hate worse than wondering or taking the time to find out if my 82 pennies are zincs or not. It would be easier to just know.
I also like the idea of the proof cents being made out of bronze, that gets my vote.

Since they don't circulate and are proofs, making them .500, .8792, .9167, .999, doesn't really matter, it would however, if the Mint decided to issue Mint sets in .999 silver. All I know in going from .900 to .999 will mean a minimum of a 10% increase in current silver proof set prices. I doubt they would a "mid-year" switch of silver composition, since the San Francisco mint runs all of the silver proofs by the December of the preceding year, and silver proofs only sell about 600-700K sets per year anyway.