Ported chokes are debated ... but I don't think they are worth the extra money for most shooters.
I would just stay with standard chokes - made by Browning or Briley for your gun ...and no, they are not cheap ....but the good thing is -- if you add more Brownings to your collection, and they are all Invector Chokes, in the same gague, they will fit more than one gun ( and it won't matter if they are semi-auto, pump or Over Unders ).
Chokes are specific to most mfg's guns / they are not interchangeable between guns like Remington, Mossberg, Browning, etc ...
I would just stay with standard chokes - made by Browning or Briley for your gun ...and no, they are not cheap ....but the good thing is -- if you add more Brownings to your collection, and they are all Invector Chokes, in the same gague, they will fit more than one gun ( and it won't matter if they are semi-auto, pump or Over Unders ).
Chokes are specific to most mfg's guns / they are not interchangeable between guns like Remington, Mossberg, Browning, etc ...