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Old August 13, 2011, 04:45 PM   #7
zippy13
Senior Member
 
Join Date: August 23, 2008
Location: SoCal
Posts: 6,415
I was trying to compare the muzzle end of the choke threaded into my 28 inch barrel with the muzzle end of a cylinder bore 18 1/2" barrel.
YIKES It's a tremendous leap of faith to assume the two barrels have the same bore!
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