If I am understanding the dimensions correctly, this is the reverse of a jug choke. On a jug choke the bore would enlarge, then choke to cylinder dia at the muzzle, thus the "Jug". This one is stated to constrict down then enlarge back to cyl. Sort of hard to "Jug" in a reduced area.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra