So i thought it might be worth starting a thread about this shell.
The shell in question is called 40/24 mm spårljuspansarprojektil (slpprj) m/49 and is a Swedish developed armor piercing discarding sabot projectile (APDS) with tracer for the 40 mm Bofors L/60 and L/70. Its historical use is generally unknown but it seems it was meant for use on the Lvkv fm/43 anti air tanks for self defense. Does anyone here havy anything on this shell? The same core (24 mm) was also used for the 37 mm Bofors anti tank gun as the 37/24 mm slpprj m/49.