Originally Posted By: PeteM

In 1914, CIP standardized 12, 14, 16, 20, 24, and 28 gauges. In the 20s and 30s, 14 gauge disappeared and 32 reappeared. Sometime in the 20s, perhaps spearheaded by a German or Swiss wanting a logical progression CIP used the 36 designation. Later CIP reverted to using the correct .410 designation. In 1961 CIP made .410 the official designation.
Pete


Pete .410 works out to 67 gauge. 36 gauge would have a diameter of .505

Best,

Mike

Last edited by AmarilloMike; 09/18/08 10:33 PM.


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