Have you tested the Bond .410. I did with very disappointing results.
The barrel (I think) is so short there's no room to build enough pressure for good penetration of birdshot or .45 shotshells.
We used heavy plastic iced tea jugs. At about 12 feet the birdshot (7 1/2?) wouldn't even penetrate one side of the jug. Just left dents. Neither did the .45 shot shell. #4 shot a couple of bb's penetrated one side.
It wasn't until we used buckshot or the PDX discs that we got better effect. Both blew out the front side, but did not penetrate the back side and the shot fell to the bottom of the jug.
Same rounds (buck and disc) in a 2 1/2" Taurus Judge blew the jugs apart. The #4 shot in a Judge didn't penetrate the back side of the jug.
I've come to the conclusion that my good ole 1911 .45 is as good a snake gun as anything, and works equally well on two legged or slithering snakes.