German "Scharfschützen" were prepared before the war, equipped with Karabiner 98 and later Gewehr 43 rifles, but there were often not enough of these weapons available, and as such some were armed with captured scoped Mosin–Nagant 1891/30, SVT or Czech Mauser rifles. The Wehrmacht re-established its sniper training in 1942, drastically increasing the number of snipers per unit with the creation of an additional 31 sniper training companies by 1944. German snipers were at the time the only snipers in the world issued with purpose-manufactured sniping ammunition, known as the 'effect-firing' sS round. The 'effect-firing' sS round featured an extra carefully measured propellant charge and seated a heavy 12.8 gram (198 gr) full-metal-jacketed boat-tail projectile of match-grade build quality, lacking usual features such as a seating ring to improve the already high ballistic coefficient of .584 (G1) further. For aiming optics German snipers used the Zeiss Zielvier 4x (ZF39) telescopic sight which had bullet drop compensation in 50 m increments for ranges from 100 m up to 800 m or in some variations from 100 m up to 1000 m or 1200 m. There were ZF42, Zielfernrohr 43 (ZF 4), Zeiss Zielsechs 6x, Zeiss Zielacht 8x and other telescopic sights by various manufacturers like the Ajack 4x, Hensoldt Dialytan 4x and Kahles Heliavier 4x with similar features employed on German sniper rifles. Several different mountings produced by various manufacturers were used for mounting aiming optics to the rifles. In February 1945 the Zielgerät 1229 active infrared aiming device was issued for night sniping with the StG 44 assault rifle.