Fred,
I also shoot a Parker Repro 28 for dove and quail and love the way the gun handles and fits me so for $500 I had Briley install the .410 full length tubes.They came with 5 screw in chokes and work perfect.The gun actually swings very well with the added weight in the barrels.This would be alot cheaper way to find out if the .410 is what you really want to shoot especially if you like shooting the Parker Repro 28.