10x,
I knew that I was not capable of effectively sniping carp with a revolver!
Who knew that shooting in real world situations was much more difficult than shooting in movies? (Hint: all of us!)
I posted another (crazy) possibility for you in the "Evaluating and adjusting fish populations" sub-forum. You might check that post in a few days and see if any of our experts have posted some workable solutions for you.
It does sound like your pond is certainly "over-grazed" at this point. Good luck on your carp culling program!