https://jamesdjulia.com/item/53198-3-402/

Virtually all side by side shotguns are not actually made with the barrels parallel - they are made pointing just slightly together, so that the shot patterns will converge and meet up at a particular range. Today, we have an Ellis Brothers (of Birmingham) sporting shotgun that was actually made with bores that are entirely parallel - and it looks quite unusual when one is used to the traditional configuration!

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