Enfield .410

[Bruce_in_Oz]

There are Indian-made ones (SMLE style) that were originally chambered for a special Indian "shotgun" cartridge just a little smaller than "proper" .410. A LOT of these have been reamed out to take modern ammo.

In the "good-old-days" in Britain, especially before one needed a "licence" to have a shotgun, a LOT of rifles were "downgraded" by the Trade by simply boring out the rifling to leave the bore smooth. Supplementary treatment could include proper boring out to take the .410.

Lithgow made a substantial quantity of .410 shotguns on "spare" SMLE actions. The front-sight base was reversed and fitted with a small brass bead, rear sight deleted, mag. well filled with a wooden block and the charger guide removed. Fore-end wood abbreviated. No rear-sight.

Unsurprisingly, there is a MilSurps link, here.