Jug choke with a cylinder hone?

[Peter LeRay]

I have a new American Fowler barrel (20ga) from Colerain that will go in my next fowler build, and I need it jug choked to modified. Anyone ever do this with a cylinder hone? I understand that a modified choke is 0.015 roughly. Thoughts? Honestly it doesn't seem too difficult.

 

[Grizzly Adams]

You mean a brake cylinder hone? I don't see why not.

 

[Eric Krewson]

A friend has done several jug choke jobs with a brake cylinder hone, all shot a better pattern, some were better than others.

 

[Pete G]

Not too difficult; it just takes a while. Be sure to move the hone in and out a little bit to taper the ends of the relieved area.

 

[zimmerstutzen]

Brake cylinder hone works well.

To clean up the bores in old smooth bores, I have but a slot in the end of a 1/4 inch metal road and stuck the end of a one inch strip of crocus cloth or fine emery cloth in the slot and wrapped the remainder around the rod, enough that it polishes the bore. I chuck it in a drill. I could polish the bore all the way to the breech. I usually did it to make it easier to see if the bore was too pitted to restore. It does get the loose dirt and corrosion out fast. but you do need to keep it moving in and out.

 

[don hepler]

I ran upon an Armi-Sport 20 ga. barrel at the flea market, and made it fit on a TC Renegade. It is jug choked. I used a telescoping gage and the barrel is .62 and is choked to .595, if my memory serves me correctly. That would put my barrel at probably full choke, so I would guess that .015 would probably be modified. So far, my only testing has been at 25 yds. and it will eat up a drink can. I am using 65 grains of powder and 7/8 oz. #7 shot, with wad over powder, then fiber wad, then shot, with thin cardboard wad on top.

 

[Dane]

A jug choke is an expansion chamber in a cylinder bore barrel. There is no reduction in size like a conventional choke.

 

[ohio ramrod]

I did one and it definitely improved the patterns. It took two sets of stones and about two hours but it did the job. :idunno:

 

[Peter LeRay]

Awesome. How much did you take off? I'm thinking .010 or .015.

 

[don hepler]

A jug choke is an expansion chamber in a cylinder bore barrel. There is no reduction in size like a conventional choke.

Learn something, every day. I did not know that. I was under the impression that "chokes" did not exist on early fowler guns, and when the chokes did appear they were called jug choke.

Thanks for the information, but now I wonder how it works.

 

[don hepler]

I read some on-line information, from several sites, and I see how the jug choke works. But it seems like gas would blow by, when the shot string crossed the jug part of the bore. And I wonder how well it would shoot a round ball, after it was jug chocked. Is there any trade-off for the tighter pattern?

 

[Zonie]

Here's a link to my explanation
http://www.muzzleloadingforum.com/...tid/295076/post/1488127/fromsearch/1/#1488127

 

[Dane]

Shoots ball no problem.

 

[Eric Krewson]

There is always a bit of debte on whether a jug choked barrel will shoot a round ball with accuracy.

Some say no way.

my jug choked full barrel shoots a round ball very accurately. It didn't until I found out what load my barrel liked, then it was like night and day difference in the kind of groups I could achieve.I went from a 15" group at 25 yards, with balls sprayed this way and that, to a consistent 2" group just by upping my powder and changing to 1F.

 

[don hepler]

I had a misconception on this issue of "jug choke", and although it does not answer the OP's question, it cleared up some things for me and perhaps others who are viewing this discussion.

Thanks. :idunno:

 

[Zonie]

Another name for a jug choke is a Tula choke, named for the Russian gun producer who supposedly uses it on some of their skeet guns.
http://shotgunreport.com/2014/06/04/tula-choke-urban-legend-version/