I cleaned the 16 ga LC Smith barrels (30" FWE)
Both chambers measure .745 at back and taper to .730'ish before rapid constriction at the forcing cone.
Right barrel - gauge slides in and you can tell it is straining a little bit against its limits but the bore measures .648 and repeats after measuring several times. At the choke end I cannot get the head of the gauge down the bore but a Galazan choke gauge shows tight full and using a dial caliper I get inside measurement of .615 so -.033 constriction.
Left Barrel - The bore measures .654 and repeats after measuring several times. At the choke end I cannot get the head of the gauge down the bore but the choke gauge shows tight full again and using a dial caliper I get inside measurement of .615 so -.039 constriction.
I was a little surprised at the tight bore measurements as I thought they would be a little more like .662
So I am still not sure about the accurate use of my SB 12 ga tool in a 16 bore.
Thoughts?
