Ideally, what you want is a Spanish-built .410. Unfortunately. they're not that easy to find used, at an attractive price. I can vouch for the Laurona as I built a .303 on a 20-bore and it is still tight as a drum after 1000's of rounds. Also, they have some desireable features for a rifle, like disc-set strikers, a breech reinforce, often they have side clips, double triggers, etc.