Some of the 12g for which I have numbers
12g 1913 Sterlingworth
Chamber & forcing cone lengthened and honed by Briley
End of chamber L .107 / R .109
End forcing cone L .097 / R .102
9 from breech L .040 / R .045
9 from muzzle L .030 / R .033
12g 1903 Smith 00
End of chamber L .110 / R .107
End forcing cone L . / R .
9 from breech L .048 / R .049
9 from muzzle L .035 / R .035
MWT L .031 3 from muzzle / R .027 7 to 5 from muzzle
12g 1906 Smith 00
Bore .730 and possibly honed. Chamber and FC had been lengthened.
End of chamber L .112 / R .118
End forcing cone L .111 / R .118
9 from breech L .044 / R .053
9 from muzzle L .027 / R .034
MWT L .025 10 from muzzle / R .034
12g 1929 Smith Field
End of chamber L .095 / R .101
End forcing cone L . / R .
9 from breech L .043 / R .045
9 from muzzle L .038 / R .039
MWT as above 9 from muzzle
12g 1905 Remington 1894 A Damascus
End of chamber L . / R .
End forcing cone L .112 / R .107
9 from breech L .060 / R .058
9 from muzzle L .037 / R .035
MWT L .037 9" to 5 from muzzle / .035 9 to 3 from muzzle
