Check your stock. Your accuwedge may be acting up. My fcp-k shot very well for the first couple hundred rounds then the groups started getting erratic and opening up. I ditched the accuwedge and bedded the stock and it had shot consistently ever since. I have since gone with a choate tactical custom and am really. Liking it.
If its not a stock issue look into excessive copper fouling or maybe even a loose scope rail or scope.