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seansean1444 · April 3, 2011, 08:05 PM

if u have a caliper you could measure the opening at the back of the barrel and then measure the opening at the front end of the barrel. then subtract the two and the amount of constriction is the choke. like .10 is imp cylinder

April 3, 2011, 08:05 PM	#2
seansean1444 Senior Member Join Date: November 28, 2010 Location: ithaca, new york (home of the ithaca shotguns!) Posts: 395	if u have a caliper you could measure the opening at the back of the barrel and then measure the opening at the front end of the barrel. then subtract the two and the amount of constriction is the choke. like .10 is imp cylinder