I have a Ithaca Featherweight 20 gauge that my wife is going to use this season to deer hunt with. It is a smooth bore barrel. I know that I should use rifled slugs in it. I have tried Winchester and Federal slugs and both seem to (walk). By that I mean if I shoot in the same place on a target at 50 yards one shot will be 6" high and another will totally miss the target and some times it will be dead on. Does anyone have any idea what I should be trying cause what I am doing is not working. We are shooting from a table with a rest so the gun is not moving. Thanks Ryan.