Any thoughts on the ideal pond gun?

Dispatching cotton mouth, snappers and the occasional rabid pointy beak feathered fish rustler are the primary uses that come to mind.
I'm thinking either a 22mag or a 12ga would be about right. A combo gun (drilling?) Might fit the bill.

Thoughts?

Last edited by Clay N' Pray; 06/26/18 05:09 PM.

Half acre 30 year old farm pond, Mebane NC. Aeration & feeder.
LMB, CC, SC, BG, HBC, two no account welfare carp and nine seasonal Tilapia that all the other fish are terrified of.