The A.P. Curtis articles that Dave mentions are the articles that I alluded to earlier in this thread. The Remington specifications that Dave mentions were dated as late as February 20, 1940, so, obviously, Remington kept the short chamber specifications to the end of production. Notice the marking on late Remington guns says "For 2 3/4" Shells" with no mention of chamber length. The chambers for 28 gauge and .410 bore guns were 1/16" shorter than the shells intended to be used.
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