ORIGINAL: ILL Boy

A 20 ga actually shoots flatter than a 12ga, the lead weighs less.With asteady aim you should be able to reach out to a hundredyards. If you have screw in chokes I wouldfirst tryan improved cylinder if you don'tyour modifyshould be fine too. If I were you I'm not sure I would buy any rifled slugs, they are meant for rifled barrels, I think it would be a waste of money for you. I would probably pick up 2 3/4" remingtons or winchesters slugger. You can get at walmart about $2.50 or $3 a box. Once you find brand of slugthat shoots consisently makesure you stickwith it because theydon't all shoot the same. Good luck.