I talked to William at sumtoy and he is making me a choke that will work with the federal hw or hv13. He is really a nice guy we talked for a while about chokes the availability of ammo. I agree totally about Clark he always has good answers to the questions posted on here you can tell he knows what he is talking about. I couldn't find the fed hw #7 until this morning. I ordered 2 boxes. Thanks Eric, when I picked it up I couldn't put it down it feels great and shoulders perfect. Now if it will pattern as good as it feels it will be a winner. I'll keep youall posted.