Originally posted by tedrbr
Those "4 shells fired in a single strafing run" (and Company promotional material to boot) were often against Sampans.
That part wasn't in the company promotional material. If the Japanese had a significant armored force deployed, you can bet the 75mm would be used against them.
Firing the 75mm on a B-25 did very bad things to the airframe. Some field conversions to the 75mm resulted in scrapped airframes in as little as 20 shots fired, due to rivet holes rounding out and stressed members.
That's why Pyro's modeling the H instead of the G; different cannon (the T13E1), special for the H model.
"Some field conversions to the 75mm" is not what we're dealing with here.
The 75mm could only be reloaded when not pulling G's with the plane. It was manually loaded. Loader going to have a hard time handling a 75mm round if the plane is pulling 3, 4 or more G's.
I don't really fire much at gv's when pulling 3 or 4 g's

There's lots of things that we're unable to model much in AHII; look at the tread at the Pony's inverted flight problem. One shot every 3 seconds or so should be fine; and close to historical accuracy. That's about what's minimum for an Abram's loader bouncing over terrain at 50mph.
Many 75mm equipped B-25's were field modified with more .50's in place of the 75mm. It was found that many banks of .50's with API, bombs, and rockets were better in strafing roles, than using the 75mm.
Against sampans. But heck, adding a bunch of .50's would at least let you get enough damage vs. the GV to be awarded the kill when someone finally hits it with a 75 or 88mm.
Then again, we don't see any field modifications being flown in Aces High. Although that P-38 would be fun with all those extra .50's.