There were 16 ga. 3" loads for retail sale. Dave will come along here and verify that, probably with some pics of boxes of them, soon I'll bet. I have read that they were only available in 1 oz. loading.

There is supposedly a picture of a M 21 in Schwing's book on the Model 21 that clearly shows the chamber marking as 16 ga. 3" chamber. Somebody that has the book, look on p. 67.

SRH

Last edited by Stan; 01/16/19 09:43 PM.
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