(I know this is a slightly older thread but I was just 'googling' the 410 shot pistol)
Hi there. Yes I have one and probably one of the few people in the UK who actually has one in the .410 calibre.... I find it great and very handy on pests close range around various farm outbuildings. For example, rabbits will often hide around where I keep various building supplies. I can just pull back the iron sheets and aim the pistol at the rabbits down the side and easily take them out. A light shot size 7-1/2 is fine, anything bigger and the recoil (and noise) is pretty strong.
Also, just out of curiosity, if you wanted a .410 shot pistol like my Bond Arms, how much would you be willing to pay for one, given the rarity of these? I don't see them for sale so I'm just curious... It's got a 6" .410 barrel and extended rubber grip.