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					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% ….. 

