understanding

I'm interested in signing up for a Utah CCW Permit course with Threat Dynamics in Sherwood, OR (Portland suburb). Although I don't quite understand what rights I get with it. IE, it works in Oregon but not Washington? Can I use it in states on the list when travelling through? What about...

Maybe you already know this, it's a good basic explanation. Understanding Shotgun Chokes, A brief explanation by Briley also good: http://cheaperthandirt.com/blog/?p=120