I had a poly choke installed by what I thought was a reputable gunsmithing firm in Toronto back in the 70's. I noticed it did not seem be shooting to point so I took it out and patterned it and also put a few slugs out of it at a target. It was consistent at 24" low and 8" R at a measured 40 yds. At that point barrel bending was the only viable option and I wasn't prepared to go that trial a error route. So I gave the hacksaw some exercise one evening and off she came. I made a slug barrel out of that barrel with the addition of proper sights, and then purchased another new barrel for the shotgun.
So pay close attention to the advice that the poly choke must be installed correctly so it shoots to point or your just wasting your time and a barrel unless you can do something else with it like I did. Poly chokes worked if and when installed correctly, but were butt ugly on a good day. The popularity and perfection of the screw in choke system put them out of business. My best suggestion would be to put the poly choke on the historical stuff shelf and consider having your barrel measured to see if it is a candidate for a screw in choke system, which also by the way must be installed properly.
