8 gauge choke dimensions

[Mike Franzen]

Originally Posted by Frank Srebro

Typical 10 and 8-gauge choke constrictions may be easily calculated using high school math and a "direct proportion" by using the surface area of a nominal 12-gauge .729" bore (Pi x R^2) and 12 gauge choke constrictions, and proportioning by using your measured 10 or 8-gauge bore diameter/surface area.

What Frank said …. I agree ….. 100% …..

[Mike of the Mountain]

By using direct proportions to convert 12g (using a .729 bore) to 8g bore/chokes, it works out to-
IC .010 = .012, M .020 = .023, IM .030 = .035 and F .040 = .046.

My bores are R .846 and L .847. R choke is .828 (.018) or LM. L choke is .831 (.016) which should also be LM.

I know someone will double check this and definitely tell me if I'm wrong.

Using the 3.14 x radius squared I still come up with LM-M choking.