Brad,
Maybe I just had bad luck.
My brother had a .410 for many years.
I fired three rounds out of it at live game, two rounds were 2 1/2 inch #5 and one 3" #5. Two shots were at spruce grouse standing still at about 20 yards, one shot with 2 1/2" and one with 3". I headshot both of them and they both got knocked over and then took off wounded and were not recovered. The third animal was a snowshow hare, basically same thing. Head shot around 20 yards with 2 1/2" #5 shot and was clearly hit, but took off and not recovered. I had shot hundreds of small game animals by the time I wounded those three animals with the .410, and I know I didn't miss my shots. Three wounded animals in a row, at very resonable ranges, and under conditions that should have been guaranteed humane kills, and I'm not touching a .410 again.
I know some guys like them, but I also know for sure I'm not the only one with similar experiences...
But anyway, happy bunny hunting to everyone!
An yes, I'm jealous of Brutus' blunderbuss!!!