Jug Choking

[CharlesHarris]

Depending upon the thickness of the barrel where it is cut off, this can work quite well.

I once had a T/C New Englander muzzleloading gun which had been jug choked using a brake cylinder hone. The gunsmith enlarged a long 2" section starting about 3/4" behind the muzzle, enlarging the jugged section to about .750" diameter, leaving the rest of the bore untouched at .730". This produced very even 1/4 choke patterns with 3 drams of FFg and 1-1/8 oz. of No. 7-1/2 shot, which I was using for upland birds.

We did not dare take the jugging further as this left only about .030" wall thinkness through the choked section and we were worried about buldging the barrel. I hope this is helpful.

For a modern repeating gun, a useful option, though more expensive, is to have the threaded for choke tubes.
This is only one firm offering such service, and I have not used them, it is only given as an example. Please do your own research as I am not recommending this company, but only offering it as an example.

http://www.colonialarms.com/catalog.html