Adding screw-in chokes?

[shotgunhntr]

I've read a few different places about adding screw in chokes to a NEF/H&R 20 ga barrel.  Has anyone done it?  Do I need to get a certain choke to start with or will any barrel lend itself to being modified to hold screw-in chokes?  How do they pattern?

[Alias DW]

There is different choke systems made to be used with different barrel wall thicknesses. Your smith will know what is best and they pattern according to the choke you pick. I like them alot.
                                                                                                                    Alias

[kingj]

I had my 12 guage threaded by Colonial Arms,it uses Spartan/Bikial inserts. Works great. They will also do 20s

[STUMPJMPR]

kingj,

How much did it cost you to have done.  I see a few places online asking $70-80

[c1skout]

 I just called a smith who is local to me and was quoted $80 to install winchoke style tubes. That price includes 1 tube.

[STUMPJMPR]

I just called a smith who is local to me and was quoted $80 to install winchoke style tubes. That price includes 1 tube.

I don't suppose that price is too bad.  It cost $50 to rent the tooling.  A choke tube will cost another $15.  Then there is the chance that your going to screw up.

[kingj]

don't remember the price on the machine work.I bought a rifled slug tube and it was $50.00.

[SHOOTALL]

If ya live near Va. Ashland Firearms did a nice job.