Great Britain used the Madsen in .303, Russia in 7.62x54R, both as a cavalry light machine-gun.
If you check the list in Chinn's book, you will see that darned near EVERYONE used the critters. They were aso used a fair bit in the Baltic countries following War One, which is where I suspect a lot of the old guns ended up, although there also were small contracts of purpose-built guns.
It was an excellent, tough, reliable gun, even if the mechanism was more than a bit strange. It was actually a full-automatic derivation of the Martini-Henry rifle, everything controlled by twin cam plates inside the receiver, has a feed arm something like a Bofors.... or maybe that should be the other way: differential motion to translate short receiver movement into long feeding stroke. Cocks easy with that big crank, makes a truly gawdawful lurch when it starts to operate.
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If you check the list in Chinn's book, you will see that darned near EVERYONE used the critters. They were aso used a fair bit in the Baltic countries following War One, which is where I suspect a lot of the old guns ended up, although there also were small contracts of purpose-built guns.
It was an excellent, tough, reliable gun, even if the mechanism was more than a bit strange. It was actually a full-automatic derivation of the Martini-Henry rifle, everything controlled by twin cam plates inside the receiver, has a feed arm something like a Bofors.... or maybe that should be the other way: differential motion to translate short receiver movement into long feeding stroke. Cocks easy with that big crank, makes a truly gawdawful lurch when it starts to operate.
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I had heard somewhere that the peculiar motion of feeding the round through the action introduced a slight bend to the neck of the cartridge, causing a wobble of the bullet in flight and increased terminal ballistics performance. I would like to have one. Very nice old gun. 
