You know, US mints mint them at some crazy volume number of coins every year, such weak striking is bound to happen. Don't the mint at one stage mint like 12 coins per second or some astonishing figure?
My partial coin collection
http://www.omnicoin.com/collection/gxseriesMy numismatics articles and collection:
http://www.gxseries.com/numis/numis_index.htmRegularly updated at least once a month.