Almost all modern guns will shoot underwater at least once. It seems the last time I said those exact words, c3 chimed in with a whole damn list of guns specifically designed to shoot underwater reliably and regularly.
The photo is from a man's photo journal of jewelry and sculptures and what nots, doo dads, and geegaws that he makes from expanded hollow point ammo that he fires under water (one single shot at a time) to get the fullest and most symmetrical expansion.
There's a video and picture article here on FTF of him using different guns and calibers, and of the different things he makes from the expended ammo.
Come if you must, but only if you must. For the day you find yourself upon my step, will surely be the night you find peace along Jordan's edge.
I firmly believe that any man's finest hour, the greatest fulfillement of all that he holds dear, is that moment when he has worked his heart out in a good cause, and lies exhausted on the field of battle... Victorious.
"Without the rain, we wouldn't appreciate the sun."~GGC