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-   -   Opening Chokes (https://parkerguns.org/forums/showthread.php?t=21169)

Gerry Addison 03-30-2017 08:10 AM

Opening Chokes
 
To anyone that has opened the chokes on your Repro barrels. Question since they are chrome lined did this present any problems when they were opened up, reamed? I've had a number of barrels opened up, but none with chrome lined barrels.

Billy Gross 03-30-2017 08:52 AM

Gerry - I had my 28 Ga Opened by Briley. No Problems - you might want to call them. Billy

Gerry Addison 03-30-2017 08:55 AM

Thanks Billy, that helps.

Paul Ehlers 03-30-2017 08:34 PM

I had my repro 28" 28ga chokes opened by Mike Orlen several years ago with no problems.

Gerry Addison 03-31-2017 10:00 AM

Great, sounds like no one has seen a problem cutting into the Chrome lining.

John Dallas 03-31-2017 10:41 AM

In these days of non-corrosive primers, what advantage is there for chrome lined barrels?

Dean Romig 03-31-2017 10:46 AM

Quote:

Originally Posted by John Dallas (Post 215437)
In these days of non-corrosive primers, and plastic shot cups, what advantage is there for chrome lined barrels?


Indeed!





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John Dallas 03-31-2017 10:50 AM

Why do plastic shot cups influence this? Never heard that before

Dean Romig 03-31-2017 11:41 AM

Plastic shot cups, which have been in use since the 60's, not only tighten patterns by virtually eliminating shot deformation - and bore scoring from the more recent steel shot - so I don't get the need for chrome lined bores either.





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Dave Suponski 03-31-2017 12:03 PM

I believe chrome lined bores were a solution for steel shot

Scot Cardillo 03-31-2017 02:01 PM

Is there a down side?

I love the way the chrome lined bores clean up so easily and the added corrosion protection is only a plus in my view.

Kenny Graft 03-31-2017 05:54 PM

I have been told the choke area is not chrome lined. SXS ohio

WmRike 04-01-2017 10:06 AM

MD*GSP - ditto that.

Donovan Kirkpatrick 04-01-2017 11:28 AM

I have a Browning with not chrome lined bbls and a Parker Reproduction with chrome lined bbls. The chrome lined bbls clean with less effort and faster.

Tom Jay 04-01-2017 02:04 PM

If all Parker Repro barrels are chrome line to handle steel shot, why is there a Steel Shot Special PR version?

Bob Jurewicz 04-01-2017 04:01 PM

The SSS is slightly over bored and choked for best steel shot patterning.
Bob Jurewicz

Steve Kleist 04-01-2017 09:28 PM

All, I have two Parker Reproductions with barrel modifications. One is a 3" 12 ga with aftermarket Briley Screw in chokes. The other is a 28 ga two barrel set with the 26" barrels opened to SKT & SKT then again opened more to .001 and .003 for skeet and grouse/woodcock in thick cover. No regrets.
Steve Kleist
Ely, MN

Scot Cardillo 04-04-2017 10:15 AM

Adding to Bob’s synopsis of the SSS..

According to sales literature, the SSS was also intended to have additional weight as compared to the standard weight of the DHE. This indicates that the standard 12 ga was intended for the uplands and the SSS was intended to make heavier loads a bit easier on the shoulder.

Ted Hicks 04-04-2017 10:44 AM

Quote:

Originally Posted by John Dallas (Post 215440)
Why do plastic shot cups influence this? Never heard that before

I've heard from modern day muzzle loader shooters who shoot saboted bullets that plastic fouling\buildup is a problem, and cleaning it is a PITA. Rifling in the barrel probably contributes to this.

Speculatively, chrome plated shotgun barrels may be smoother and\or have less of an affinity for plastic fouling? If so, opening up a choke and removing the chrome plating may create a place where plastic from shot cups could build up?

I would not let that stop me from making the chokes what I wanted them to be, but there may be an added step to remove plastic fouling after a lot of shooting. Just a theory at this point.

John Dallas 04-04-2017 11:08 AM

Plastic shot cups tighten patterns versus old shells because the shot cup cushions the shot, reducing or eliminating deformation or scrubbing of the shot as it travels down the barrel. In my experience, plastic deposition is not a big deal. I've heard that modern shells pattern about one choke tighter than old shells, but haven't sween any testing to confirm that.
I shoot a lot of sporting clays, and probably don't need any special treatment more than once a year, when I spray the barrels with carb cleaner. Because our shotguns don't have rifling, cleanup is easy, and not required as frequently

Gary Laudermilch 04-04-2017 03:03 PM

I had the chokes opened to .004 and .008 on my 20ga 26" repro. It is my primary grouse gun. Prior to the start of hunting season I'll put close to a 1000 rounds through it. I have never had an issue cleaning or with plastic buildup. In my view the powder used is much more prone to cleaning issues. I have never regretted opening the chokes.

Harry Collins 04-04-2017 03:31 PM

The problem with plastic in a muzzle loader is black powder will melt the plastic in the barrel.

I have opened the chokes on two Parkers and have nightmare's over it. At one point I thought IC was the best of all worlds and opened up the left barrel to match the right on a GH I used for everything. Now I prefer about .015 constriction, light modified, and .025 an improved modified. I have a VH with 26" barrels choked like that. The other set of barrels are 30" with .030 and .042.
The other Parker opened up was a 32" VH choked full and fuller. 3" chambers and IC both barrels to shoot steel through. I want to throw up every time I think about that.

Harry

Ted Hicks 04-04-2017 04:06 PM

Thanks for the experience-based info on plastic fouling in smooth bores. I'd never seen it but you guys shoot a lot more than I do. I am going to have to do something about that.

Terry Hobson 04-05-2017 08:09 AM

I shoot 3-4 rounds of skeet per week with my SSS. The thing is you can't see the plastic build up when looking down the barrels. However when I apply some solvent in the barrels it is amazing how the plastic rolls up when I send a jag down the barrels.

After discovering this I scrub the barrels on all my guns more frequently during shooting seasons.

Dean Romig 04-05-2017 08:15 AM

I found that the plastic buildup in my 20 gauge Repro skeet gun really played havoc with my patterns and might possibly cause excessive pressure. I was amazed at the solvent-softened gummy buildup that I removed from the barrels.






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John Campbell 04-05-2017 09:03 AM

I am no expert or professional in ammunition construction.

But from a purely observational/experience standpoint, I've noticed these factors effect plastic fouling buildup.

1) Gun cleaning. If a gun is not cleaned throughly after each use, fouling hardens and layers up.
2) Ammunition choice. Import stuff is a cypher as to powder and wad quality.
3) Handloaded ammo powder choice. Powders like Red Dot foul more and create more fouling/drag.
4) Handload wad choice. Known quality wads like Claybuster are made with specially formulated plastic and foul less. Imports? They often foul more.
5) Primer choice. Federal or CCI Magnum primers help to more fully burn heavy fouling powders, leave less residue and thus less drag on subsequent wads/shots fired.

These are my observations only. See your ammunition professional for details. Tom Armbrust is one.

Terry Hobson 04-05-2017 09:26 AM

I use claybuster wads.

Gary Laudermilch 04-05-2017 01:35 PM

I had an issue with plastic buildup one time. It was with a well regarded low pressure factory load.

I use claybuster wads for everything and have never had an issue with plastic buildup in any of the guns I load for, chrome lined or not.

Tim Thomas 04-05-2017 04:23 PM

I have been using Gunzilla to clean shotgun bores for about 10 years. First saw it at the Grand American Tournament and while being very effective on plastic wad residue it is also much safer to use than some other solvents. Like some have mentioned, I didn't think I was getting wad buildup until I cleaned a bore or two with something like this that is very effective. I clean the bores of every shotgun I shoot every day after a hunt or trip to the range. Didn't always do this but had the chambers rust in a nice M21 Winchester because I was lazy. One of those things that make you sick when it was so preventable and I vowed it would never happen again.

allen newell 01-27-2023 05:28 PM

I opened up the chokes on one of my Repros. No regrets.
I also clean my guns as soon as I get home. No issues with fouling

bob lyons 01-27-2023 08:48 PM

As my dad told me never let the sun set on a dirty gun.

Aaron Beck 01-29-2023 09:37 AM

In my limited experience soft shot vs hard can make a huge difference in opening up patterns on paper, even more than card wads vs plastic wads.

William Davis 01-29-2023 01:28 PM

I know of a original DHE that bulged a barrel unexpectedly, not mine but word was no obstruction noticed at home after shooting. Don’t know for sure what caused it. We suspect plastic build up from wads. High volume clays gun.

William

Stan Hillis 01-29-2023 08:38 PM

Chrome lining helps prevent/forestall plastic fouling. Several days of high volume dove shooting will verify this. Hot barrels will build up plastic fouling much more. When the chambers build up with plastic to the point that the empties will not eject, but the bores are clear, it's pretty obvious the advantage of the chrome lining. I've seen this many times on my 20 ga. Beretta 687 SPII Sporting, in Argentina.

For most applications it may not hold any advantage. But, for high volume, it is as obvious as a neon sign on a dark highway.

allen newell 05-08-2023 12:39 PM

What is the best bore solvent to use in cleaning gun barrels?

Jim DiSpagno 05-08-2023 02:08 PM

Hoppes no.9 and a frontier pad

allen newell 06-08-2023 08:27 AM

That's what I've been using for over 50 yrs.


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