pattern your gun before you start dumping money on aftermarket chokes.
Not all shells work well in all guns/chokes.
Black cloud is low and to the left at 30 yds with my Mod choke, most other stuff is pretty decent.
And you can wear a choke tube out, either that or I got a bad one.
I thought it was plastic wad material and soaked the choke in Carlson's Choke tube cleaner, didn't change a thing so I picked at it with a scribe and the chrome was peeling away.
Berretta Optima plus choke tube, all factory shells through it.