Sorry to tell you. I have a scope mounted Mossberg pump 19.5'' smoothbore barrel using Winchester 1ozor Brenneki 1-1/8 oz12ga. At 50yds I can cut the same holes. I gease my slugs. It makes a big difference. (don't try in auto loader) Atone hundred yrds it drops 6''. At two hundred it drops 32''. I will prove the 50yrds groups. Of course! $$$$