Choke length; bore to choke constriction
1926 12g Smith Long Range courtesy of David Williamson
R: 3 3/8; .730 to .688 with no parallel segment = .042
L: 2 1/4; .7305 to .688 with a 3/4 parallel segment = .0415
Hunter Arms advertisements refer to the LRWF as being specially bored to a longer, tapering choke.
1903 12g Smith 4E
R: 3; .728 to .692 = .036
L: 2 3/4; .728 to .693 = .035
1906 12g Smith 00
R: 2 1/4; .728 to .720 = .008
L: 2 1/2; .728 to .695 = .033
1902 16g Smith 0
R: 3 1/2; .656 to .622 = .034
L: 2 1/2; .650 to .620" = .030
1903 12g Smith 00E
R: 2 1/2; .728 to .726 = .002
L: 2 3/4; .728 to .712 = .016
1906 16g Smith 0E
R: 1 1/2; .650 to .632 = .018
L: 1 1/2; .653 to .630 = .023
1905 12g Remington 1894
R: 3; .733 to .706 = .027
L: 3; .732" to .697" = .035
1913 12g Fox Sterlingworth
R: 3; .728 to .721 = .007
L: 3 1/2; .727 to .710" = .017
