Has anyone any experience of "jug" choking or recess choking whereby a cylinder barrel has a slight recess formed in the bore approximately one inch behind the muzzle; recess then causes the shot to gather before leaving the muzzle resulting in a denser pattern - effectively "giving back" choke to a gun without it?
The only reason I ask is that most pre 1875 doubles seem to have no choke and whilst this is practically little issue for shots 35 yrds and below, it can be restrictive outside of that - especially on wildfowling/waterfowling bigger bore guns. I am NOT advocating crazy long range shooting here at all - but simply that on occasion, having some element of choke can be beneficial.
Interested to hear opinion, especially whether anyone has ever seen this done on Damascus barrels (assuming plenty of barrel thickness to work with)?
