Jank said:I didn't realize that some of the machine guns on the 88 were 13mm. Yes, somewhat close to the .50 BMG. I believe the MG 131 had a higher cyclic rate of fire.
MG 131 (13mm)
projectile weight - 36.2 grams
velocity - 730 ms
M2 (.50)
Projectile weight - 43.3
velocity - 880 ms
There's no doubt that in terms of KE the .50cal was superior, but the MG131's incendiary projectiles were superior and pretty much made up for the lack of KE with a larger surface damage caused on impact.