JMR40, Try a Trulock, Carlson, or Sumtoy choke made for the specific type of shot you are shooting.
Huge vote for Sumtoy in a 20 gauge !!!!
We're shooting the (discontinued) Federal Heavyweight 7's through .562-5 Sumtoy tubes..........kicking ass and taking names. Along those lines and still in production are the Federal and Apex TSS offerings. On a budget...... Winchester Longboard XR's are BAD MEDICINE !!!