Thanks for the info. If I could choke my shotgun I'd be happy. My Stevens 320 is just a cylinder bore. It doesn't mention its equipped for installing chokes tho. Is there anyway this could still work ?

Dontcha think that extra bit of information should have been included in your first post?
Rule number 10. Learn The Mechanical And Handling Characteristics Of The Firearm You Are Using
Not all firearms are the same. The method of carrying and handling firearms varies in accordance with the mechanical characteristics of each gun. Since guns can be so different, never handle any firearm without first having thoroughly familiarized yourself with the particular type of firearm you are using, the safe gun handling rules for loading, unloading, carrying and handling that firearm, and the rules of safe gun handling in general.
For example, many handgun manufacturers recommend that their handguns always be carried with the hammer down on an empty chamber. This is particularly true for older single-action revolvers, but applies equally to some double-action revolvers or semiautomatic pistols. You should always read and refer to the instruction manual you received with your gun, or if you have misplaced the manual, simply contact the manufacturer for a free copy.
Having a gun in your possession is a full-time job. You cannot guess; you cannot forget. You must know how to use, handle and store your firearm safely. Do not use any firearm without having a complete understanding of its particular characteristics and safe use. There is no such thing as a foolproof gun......
Clipped and pasted from the American National Shooting Sports Federation...
BTW, not hacking on you, just reminding others ...
Rob