I am just starting down the path of exploring the 410. I used a friends O/U and liked it so much I bought a pair of sidekick tubes from Briley. Getting shells might be harder than finding the right gun. The bad influence that started me on this path shoots almost exclusively 410 and they run from a Pigeon gr 21, Parker, Perazzi, Italian hammer etc. The only one he doesn't shoot exceptionally well is an English hammer gun that weighs nothing. I passed on a English sidelock sidelever at the last Vintagers that if I see again will buy. My rule is if I can't shoot it well it goes down the road but that 410 is so cool . Good luck on your quest