Anyone you consider qualified to open your chokes to whatever you're after is going to tell you an original Parker barrel doesn't rust so why should a chrome lined bore, honed to below the chrome (. 0015" -.0020").
If there was such a thing as a repro bore chomed up to but not including the choke, it had to have been done before they finished the barrel. If you understand ID Plating, you would understand they can't chrome 22" and not the remaining 4". Don't work that way.

It’s industrial chrome. Bores can be masked so that the last couple of inches are not plated, during the plating process.

If there is chrome plating on your chokes, it will disappear quickly w/standard cutting tools so long as you get “underneath” the chrome from the get go, and that’s simple to do b/c the chrome is thin.

Opening the chokes is not an issue, at all.

I had Mike Orlen open up a set of repro 28" 28ga chokes with no problems. That was several years ago & there hasn't been any issues with them since.

Send them to a good barrel man like Kirk Merrington, Mike Orlen or Briley's & don't worry over something that doesn't need to be worried about. All of us gun guy's have a tenacity to overthink things sometimes.

Just curious...why not spreaders and then essentially have 4 choke choices?

BINGO!

I can't tell you the number of Repro owners that have opened their gun's chokes in an effort to make it their dream gun. Many of these are PGCA forum regulars that have justified these alterations by saying it's their gun and they are free to do whatever they want with it. True. But, most also claim they'd never sell the gun while they're living and let their heirs worry about it only to sell it down the road when their-gun-with-the-metal-ground-out-of-it didn't live up to their expectations. I have a couple of shooting buddies that have opened multiple Repros a multiple of times, only to sell each and every one of them. :banghead:

There, I feel better. :whistle:

Well I have had 3
28 in repros opened
Up to skeet , I C,
When I got the first
28 ga repro, a double trigger, 12 years ago ,i shot skeet
With the mod and full
Barrels until I got a straight
It took a year and
I figure 15000
shells.
I decided to make it easier
On myself and had the
Chokes opened up to skeet and IC.
I then was shooting
Straights one out of
8 rounds. I am not a competition shooter .So for my purpose it was
wonderfull.

Question?? what do you people do
With the Mod and full
Barrels, bet most not
Used

Pat, thanks.

Who did you have do the work ?

Thanks

Jeff

Briley did first set, they were to install their thin wall chokes, but said
Barrels not thick enough, so for 100
Dollars they opened the chokes to skeet and ic
The others were sent to be fitted
To Bill Schwartz in Ellijay
Ga.
I bought one set on auction
For 25 dollars no one else
Bid on a small estate auction
Other set was bought
From gun dealer, pawn shop on Guns
International , as 2 barrell non matching set for 4200 dollars. They had to be fitted also

The first 20 ga repro I bought was choke IC/Mod and it shot wickedly tight. Since it was intended to be my go-to grouse gun I had the chokes opened to .004 and .008. Since then I've shot many grouse and doves with it. I also shoot clays with it just prior to grouse season and it will break 35 yard targets well. No regrets. A good move. My grandson would love to get his hands on it but I told him I may be old but am not quite ready to give up following a setter after grouse. I would feel naked without my repro which is affectionately known to he and I as "Sweet Pea". Some day!

Of course an equally good move would have been to purchase a Q1/Q2 gun to begin with. At the time I did not know such a thing existed. Since then I have purchased one so choked. I have patterned both and they perform about the same.

Actually, some may opine that it would have been a whole lot better had you done just that. Not necessarily for now, but for the future generations of collectors that will covet originality.