Just got some open-reed toneboards from Al, and I'm about to try making my first open-reed predator call this weekend. I thought there was a tutorial on making the barrel but if there is, I can't find it. I've scoured through most of the pics/posts on the predator call page and have a good idea of what to do and how to do it. Here's my question: How far into the bell of the barrel do I open it up? Am I basically hollowing out the entire call? Or, just tapering it into the 1/2" bore an inch or so into the call?
