Poly Choke installation

[jpw062]

I am designing a short light shotgun for small game and taking with me on wood walks.
Basics are a 20 ga single shot internal hamer with a poly choke. Prefer an "Italian folder" type design, but there are some good prices on Winchester 37s and they are a really well built gun I have always liked. I like the italian folders and they are lighter, but I already have one in 12 GA, although, it is quite a thumper with a straight stock and no weight. Actually kind of nice gun as it was a beretta branded gun from another italian shop. I will probably sell it once I get the 20 ga built.
Feedback on any part of this is welcome, but I am specifically looking for guidance as to the installation of the poly choke. I have been searching for a step by step guide or a gunsmith with a reputation for installing these. It seems there are some tricks to doing it.
My research into the screw in version leaves me less than confident in that product.

 

[DocRock]

If you can get one threaded for chokes, you can get a screw in Polychoke. If you get one with modified or full choke, you can probably have it threaded for screw in chokes (@$70) and screw in a Polychoke.

My experience with Polychokes is that at about IM, patterns start to deteriorate pretty rapidly. The transition is awfully short. But CYl through Mod they are quite useful.

 

[cdb1]

My research into the screw in version leaves me less than confident in that product.

If for some reason you just want a poly choke then go for it. But I don’t know where your research came from because screw-in chokes from someone like Mike Orlen or Briley are the cat’s meow.

I’d also heed DocRock’s advice.

 

[Cvans]

Here's a couple I made for my Mossberg. I would suggest you purchase a gun that accepts screw in chokes.

 

[George P]

Another vote for the screw in type or just have the current barrel choke redone to light mod; that will suffice for woods walking

 

[Virginian]

I don't like any element of your design, but I wish you well. For Poly-Choke I'd go to the well. https://www.facebook.com/NitramPolyChoke
Any decent single barrel should work for a starting point.

 

[WestKentucky]

I have a Mossberg pump with the c-left-a-choke on it. I love that gun. It’s a 20ga and in the woods it’s no issue at all to tighten down down for a shot at a squirrel in the tree tops or open up at the edge of a field for quail or rabbits. I really like your thought process and am looking forward to seeing how your finished product works out for you. I have cranked mine down as tight as it goes and with 3” turkey loads it’s a beast, but it’s almost as tight as a true turkey choke and I absolutely believe it will get the job done if it is put into that role. I don’t like putting slugs through it, but I have with no damage, I just opened it way up to where there was barely any tension on the collar leaving the petals open so that they didn’t take much of the force as the slug passed.

 

[Cvans]

I'm a firm believer in the poly-chokes. If you can ignore the looks they are effective.

 

[George P]

And make the gun muzzle-heavy.........Extended choke tubes are easy enough to change; although I prefer a fixed choke for a field gun - less to mess with and nothing to lose.

 

[jaguarxk120]

I think that Poly-Choke is long gone and what you might find is a used choke from Ebay.

 

[DocRock]

I think that Poly-Choke is long gone and what you might find is a used choke from Ebay.

Good point.

https://www.shotgunworld.com/bbs/viewtopic.php?t=459127