Rifled slugs were designed to be fired through non rifled guns like yours.However their pressure and the choke of your gun will be the deciding factors on whether they are suitable for your gun and whether they will shoot straight.I am sure you should be able to get more advice from the resident experts if you gave them the choke of your gun, the weight of the slugs you intend to use and the proof pressure of your gun.Keep checking. Its not how well you shoot , its how much noise your gun makes