11mm Pin fire
Krevadpatroner is cartridges used since before 1890 to simulate artillery detonations. The first generation of Krevadpatron were used as a stationary device, detonated by a operator pulling a string connected to a detonator in the krevadpatron.
The 'Nordisk familjebok 1876-1899' (Dictionary) explains the krevadpatron in the following way:
Krevadpatron is a in glue drenched hemp string wrapped load of gunpowder, that is ignited with a friction igniter. The amount of gunpowder resembles in weight with a real grenade to give a resembling smoke cloud. Krevadpatroner is used within the artillery training to practice the judgement of distance and at adjustment of fire to mark the projectiles detonation.
This was changed from the m/13 to be a form of grenade fired from a special purpose rifle to simulate air detonations, or a detonation in the air indicating a area to be under artillery fire to train the troops meeting the artillery rather than for training the artillery crew.
Both rifles and pistols has been used over the years to shoot the krevadpatron