I feel like the topic of cannon damage are pushed by 2 sides mainly
german mains, who want the mg151/20 becoming a one shotter and leave every 20mil behind.
USSR mains, who know that the shvak and subsequent models would turn into a mid cannon that relies on API.
I still want cannon nerfs, but both cannons need to be in their respective places.
shvak must actually need to carry API to hit fuel tanks unfortunate, but thats what happens when put 6.36g of TNT equivalent and compare to a round that has like over 4.5x as much kick, time to switch belts.
and mg151/20 can’t also get away with becoming a 40 bofors cannon, your ballistics could be bad, but that doesn’t justify blowing up an IL-2 with 2 rounds to the wing, there was a reason for the existance of the MK-108, 20mm Mine shells were not a scifi wonder weapon, they were simply a small step forward.
mg151/20 cannot outclass 30mm cannons, the only cannon that has a higher caliber and the mine round can beat is the russian 23mil (16.94 g of TNT equivalent vs 29.76 g of TNT equivalent), but said 23mil beats it in ballistics so pretty balanced.
In a nutshell
Shvak becomes a fatter berenzin 50cal with a lot more kick (12.7mm explosive rounds must also be toned down)
mg151/20 becomes a hard to aim and subsequentially limits a plane’s range, even so, it simply has more chances to make larger (more drag), blow away control surfaces, and damage wooden spars.
hispano cannon (spaded because stock it jams a lot) which I will consider from hispano Mk.I to Mk.V include the 404 from France and Oerlikon FF from Finland, have incredibly good ballistics and pack around a bit more punch than shvaks, only differences are belts.
An/M2 has over the half of TNT filler as the mine rounds and with ballistics to back up, while the M3 has ballistics of a hispano cannon and actually less power than a AN/M2 but still better than a hispano cannon.
Type 99 model 1 cannon from Japan will be a near copycat of the shvak, both model 1 and 2 have the same ballistics, but type 1 has a lot less explosive filler, hell on both cannons, the full tracer belt IS BAD try to look of the non tracer explosive rounds, since the Type 99 doesn’t recieve API, only aphe which in itself is just little more powerful than a hispano SAP, but still weaker than a shvak FI-T.
Type 99 model 2 is closer to the AN/M2 funnily, even close on explosive filler, but falls shorts on ballistics.
Akan m/45 and Akan m/41 are both just reskinned version from one another and beat the hispano family on all aspects, by a super duper small amount.
aircraft cannons have differences other than belts, people need to accept that.