My 1930-vintage VH 0-frame 20-gauge has the 2 3/8-inch chambers intended for 2 1/2-inch shells. The progressive burning powder, high velocity, 1 ounce 20-gauge loads, mostly put up in 2 3/4-inch cases, came out in 1922, but Parker Bros. certainly didn't rush to chamber their 20-gauges for such loads. Remington made their Model 17 20-gauge pump for 2 3/4-inch shells from the get go and Winchester began making their Model 12 20-gauges for 2 3/4-inch shells by 1926.
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