We've got quite a few of them, too, here in the Trinity River headwaters... . I've seen thousands of them balled up in creeks during breeding season. On the +N (Crossen) ranch North of me 3-4 miles, I've seen them literally block the water laying on a road crossing in a big creek leading down to Clear Creek. I've shot into them with a 12ga Magnum with BBB shot, and seen them literally cut to pieces, several of them, and then watch them float away in the flowing water, only to instantly have them replaced by more..... I've burned many rounds that way, and the next day, they're back and PO'ed!!

Where I live here in Denton Co. , I've killed several with ratshot whenever I don't have my favorite snake killer, my shovel!! (A hoe works great, too, maybe even better, but I usually have a shovel on my truck. ) The ratshot comes in handy when they're on the water following you while walking along the creek..... At 4-6ft, they usually jerk really hard, then roll over and float. Obviously, I don't wade into the water after them, but when I catch them in shallow water along crossings or small creeks, I have at them, if I have time... ... I've had horses and cows get bitten several times, and almost lost a horse once..... I think the mass migrations of them is what happens up on Crossen's... There is a large Conservation lake North of that creek crossing, and I used to see lots of them up there..... We'll also go down and shoot on the tanks (stock ponds) with our . 22s. It's good population control... One of my favorite pastimes, shooting snakes and snapping turtles out to 300yds..... The longer distances require a little "bigger" cartridge, and that's fun to take the 22 Hornet, . 223Rem, 22-250, 243, or maybe even the . 270. They'll be close for the first 30 minutes or so, and then they'll start moving further out across the tank. The snakes dissapear after about 3-5 minutes... they know the routine. The turtles, though, they're not that smart. They'll stay under for awhile, but when they come up for air.....
The . 22 Hornet is one of my favorite plinking cartridges... . I load the 60 V-max bullets with 10gr H4227 for coons, priarie poodles, and closer things I don't want overpenetration on, and I load the 40gr V-max with 12gr... . The 40 also works nice for turtles and snakes!!