http://www.indiancreekss.com/home.htmThese tubes swept every class at last years NWTF Still Target Championships. They won every single class. The Black Diamond Strike choke tubes hold the current worlds for shotgun and muzzle loader shotgun as well.
Here's the world record target of 54 shot inside the 3" red circle.
These choke tubes are made in Frohna MO. That's not too far from me. They are making some great choke tubes.