People do have some problems with them as you can see. The one problem a friend of mine had was this: He tried to use the .410s in his twelve gauge O/U. But the smaller shells did not give enough recoil to cock the second barrel. This can cause a problem, especially at a club like mine that uses tokens to shoot a round, and you are only given 27/2 extra targets to shoot at. And it is even more embarrassing to flinch every other shot. But, the other guys shooting with you usually enjoy watching, until they realize that you are shooting their extra birds, after it happens several times.
