Sub sonic rounds such as air pellets (and many rim and centre fire rounds) will just make their way to the bottom of the water.
Hypersonic rounds will disintegrate as they hit the water
The chance of a bounce is millions to one.
Am I the only one who watches Myth Busters on Discovery?
Phantom
your not the only i watch it, did you watch the one were they fired bullets into the swimming pool to see how far it went, any way me and my dad took three mallards out with a rapid 7 22 try and shoot the ones that are close to the bank so you cn get them out the water eas