I have no experience with a genuine, name-brand PolyChoke, but I once had a shotgun with a clone collect-type adjustable choke. That choke had numbers 1-8 on it, each with a click. It also had a line of print on it telling me that adjustment should be limited to two turns. BUT, from tightened all the way down to loosened where it came apart was twelve turns, and I was never sure where those two turns should be in there. Much informal patterning (I didn't count pellets inside 30 inch circles) showed little difference between one setting and another. I did notice that whatever loads I shot through it tended to soot it up pretty fast. I eventually had it taken off and slug sights mounted on the resulting 24 inch barrel, and later bought a 28" "mod" barrel.
