Hello Adam.......Sorry I did not see this before now! To answer your question......It would not hurt anything to shoot Terminator (1200'/"), Express (1300'/") or Xterminator (1400'/") in your rifled choke tube. Some people have got decent groups and others have not. With this in mind, Dixie Slugs says use only full rifled barrels..........James@Dixie Slugs
PS.....The new 3" 20 ga Xterminator II is being tested.........620"-500 gr-1450'/".....jcg