Sorry for this loooong post.
Dinger's leathatlity tests against a hangar show that the FW and the F4U-1C are essentially equal against that type of target. That may hold true against aircraft; if we can figure out a way to test it, I suspect it will.
Therefore, if there is a major difference in the F4U-1C guns and the FW guns it is most likely in trajectory. The two most important components here are muzzle velocity and ballistic coefficient. The HS has a higher MV which would give it some advantage. I have no data on BC for either round, but I know Pyro is looking into this stuff. I'll wager he has more data than any of us.
It may turn out that HS trajectory is too good; if so I'm SURE it would be adjusted. Maybe the FW trajectory is not quite as good as it should be; I'm SURE it would be adjusted.
How about we just temporarily suspend all the gun complaints until Pyro finishes his review? These guys do a lot of work for a small shop. There's that old saying "Every day we do more and more with less and less and soon we'll do everything with nothing!" Let's give them just a bit of time, OK? The guns review is work in progress; be a little patient.
As far as the Hog flight model, some
interesting data has been posted concerning an "official" comparison with the FW that was flown in WW2. From that data, it would seem the Hog FM may a bit undermodeled.
Funny we don't hear a major outcry from all hands asking that this situation be investigated, isn't it?
After all, ALL of us want accurate flight models for ALL planes, right? Looks like we have some hard data showing the Hog is a bit anemic.
So let's all bombard Pyro with requests to review the Hog FM! Make his day! Bury him with more complaints! Threaten to leave!
At least it would be a NEW topic!

There will always be aircraft that are better than others. This can be because the aircraft is better than the other in THAT situation (like B&Z) or because it was just a generally superior aircraft (Spit XIV springs to mind) or because there are problems in the way it is modeled in the game (hey, it happens and who amongst us is REALLY qualified in any of these aircraft?)
Why not have fun, play the game and learn to use the airplane you like to fly?
There are NO planes in this game that are "Totally Uber" in every situation. So, avoid them until you have the advantage! All part of SA, I think!
Have a really nice day!