To play this vehicle well, you must shoot and scoot. The Puma adopts a lot of typical light tank tactics. The Puma has a coaxial MG42 that is only useful against exposed crew members. With a reload of 4.1 seconds and high velocity shells, this tank can do the job both in close-quarters and at long range. As the APC shell has no ballistic cap, it might struggle against angled armour, so it is best to go for side shots.
It can select from a 106 mm pen APC shell, which should be your main round, two APCR shells with 130 mm and 137 mm pen respectively (you should carry a few of the better ones, especially if you uptier the Puma so it might see KV-1s, as well for long range sniping), and an HE shell witch can be used against AA trucks. The cannon was designed for a, anti-tank role and it does its job well. The Puma fields the KwK.39/1 cannon, a similar cannon to that seen in the late Panzer III models, as well as the same ammunition.