How common are jug-choked shotguns? I always thought that a jug choke was only used when some choke was to be put in a gun that was already cylinder bored as when the barrels were cut back.
I was reading a letter to the editor in "Forest and Stream" 1889 which seems to indicate that jug-choking or as they called it "Recess-bore was common.
This may be of interest;
"Recessed-bored Shotguns

Editor Forest and Stream:
In the "Forest and Stream" for July 25 and Aug. 1, (1889) are the published results of a gun trial that you kindly had made on your range. As the recess system of boring is apparently but little understood in this country, Perhaps you will allow me a little space to describe its advantages. It is not really a choke, but an enlargement of the barrel, commencing about 2in. from the muzzle and extending toward the breech for from 2 to 4in., the last 2in. of the barrel being practically of the same diameter as that part on the breech side of the recess; there is, therefore, no obstruction to the passage of a ball. Without reference to the use of the latter, some English gun makers adopt the recess method of boring in all their guns, and obtain with it as close a shot pattern as with more common form of choke. It is much used by sportsmen for jungle shooting in India where game can only be seen at close range, at which the effect of a 12-gauge round ball is found to be quite as deadly as that of a .45 or .50 express bullet......."

How common was this? Has anyone found many English guns choked this way?
Pete