+1 on the 20 gauge shells.
I was in Oakland CA and randomly found the two I'm using on the ground in a parking lot a few days after I did my tail chop. I'd read about doing such on this forum so I snapped 'em up quickly when I saw them, half expecting someone to yell out "hey buddy that's evidence!" Perfect fit.
I try to spend as little time as possible in Oakland parking lots now.
![](http://www.barnold.com/img/ducati/shells.jpg)