Every gun is different. You will need to try several diff rifled slugs to find the best fit for your gun. To cut to the chase you really want to purchase a rifled slug barrel for your gun. If accuracy is what you are looking for it is the only way to go and in the long run will save you money as well as frustration. Save your pennies, lunch, birthday, and Xmas money. Money is tight for everyone but this will give you the results you are looking for.