Does overboring affect value

[Dean Romig]

The nominal bore diameter of any 12 gauge barrel is .729” which will require 12 lead spheres (balls) of that precise diameter to equal 1lb. exactly. Overboring to a larger diameter is not “nominal” for any gauge.





.

[Bruce Hering]

Originally Posted by Dean Romig

The nominal bore diameter of any 12 gauge barrel is .729” which will require 12 lead spheres (balls) of that precise diameter to equal 1lb. exactly. Overboring to a larger diameter is not “nominal” for any gauge.

Dean:

Thanks. I realize over bore is not nominal as related to factory. That is why I asked the question. Most of my modern 12 ga. guns are larger then that up to .735 and even .738 in some of the after market work by Briley and Angleport.

[Hokievet]

I believe this to be .760....thoughts on that?