The vehicle could carry two different armor piercing shells for the Pak 39 gun: the Pzgr. 40 high-velocity tungsten cored round, which fired a projectile at 930 m/s that could penetrate 120 mm of armor at 500 meters and 97 mm at 1,000 meters striking at a 30-degree angle, but was often in scarce supply; and the Pzgr. 39 armor piercing, ballistic-capped with explosive filler and tracer element, launching a heavier projectile at 750 m/s that could pierce of armor at 500 meters and 95 mm at 1,000 meters. Based on tests using Pzgr. 39 ammunition, with correct range estimation and competent gunnery a 99% chance of a first-shot hit at 500 m and a 71% chance at 1,000 m was estimated. The vehicle also carried standard high-explosive rounds and the Gr. 38 HL/C HEAT round designed with a shaped charge, but this was less effective and accurate against armored targets than AP rounds.