Update - actual bore and choke dimensions for these two Steel Shot Specials.
12SS-00175
Bore Right = .7350 / Choke = .0076
Bore Left = .7345 / Choke = .0121
12SS-00176
Bore Right = .7351 / Choke = .0079
Bore Left = .7346 / Choke = .0123
*Bore dimensions taken 3.0 behind muzzle - choke taper / geometry begins 2.5 behind muzzle - unrestricted shot travel = 22.5 (5.5 barrel length decrement)
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