Good luck...I have been on the same mission all last season and again now. My success with a 22 is marginal. I think when they are in water at all deep..like 2 foot down, the bullet deforms so you are at the mercy of the bullets path and I have never mastered hitting them when they are sunning perpendicular to me(broadside). I have hit 5 all moving directly toward me aiming at or in front of their nose.

They are so spooky. Sneaking up on a turkey would be as hard...walk softly.

I have just bought a bowfishing rig and will be using it soon. Midday seems best time to see them in shallows sunning in my pond. Ill get after them after spray season and after the gnats go away.