Currently Ho-103 is given a belt with 3/4 HEFI. It used to be 1/2 HEFI and 900 rpm, which is already a bit too effective for a heavy machine gun. Combined with the characteristic of 900rpm, it is fair to say that 2 Ho-103 is as effective as some of the best 20mm cannons. Based on my experience, it is really easy to one-tap anything with 4 Ho-103.