I just bought a MEC 9000 in 28-gauge and to load 2-3/4" shells as chambered by modern guns. Just trying to learn here. I thought the original 28g shotshells were 2-7/8" and later standardized at 2-3/4". What guns were made for 28g shells shorter than 2-3/4" (considering the Parker chamber convention of 1/8" short for the intended shell)?
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