Hogwash, for the most part...
I have no clue what my hit percentage is ( and I honestly don't care).
Then how do you even know whether you're qualified to help/teach/guide someone? All of your info is irrelevant if it's not "proven". How foolish would it look if you came in and gave advice to someone asking for gunnery help, only to find he's an equal or better shot compared to you?
The OP isn't asking how to get more kills, he's asking how to improve his gunnery.
The only important gunnery measurement is the number of kills.
LOL! You've got to be kidding... Number of kills is
not a (reliable, anyway) measure of gunnery proficiency. I get kills without even shooting! I get kills even on a "off" night, when my gunnery is in the trash! I sometimes
fail to get kills when my gunnery is outstanding!
Hit percentage, on the other hand is a much more reliable indicator of proficiency. Not 100% reliable, but drastically better than "number of kills". It can be skewed a bit up or down depending on several factors, but also, once those factors are identified it's not difficult to remove them from the equation, either, if you want the info to be even more reliable.
Hit percentage matters in other aspects too. A higher hit percentage leads to shorter fights, quicker kills, less use of ammo, and less loss of SA. If your hitting 1/2 as often as I am, it's likely going to take you longer to finish the fight (you'll miss shots that I would be twice as likely to make). This is going to cost you more E, more ammo, and more SA, to name a few... When you do get a shot you can make, it'll likely take twice as long to land enough hits for the kill, again at more expense... Those shots are probably going to be spread out more, too, requiring more ammo... And even if the hits I make are inconsequential damage-wise, the effect on the other pilot can be telling.
One possible area of difference is wing mounted versus nose mounted guns. I fly the P38 mainly and the tracers hide the target from me because they are right in front of me. Wing mounted guns don't do that as much so tracers on might work better in wing mounts.
Yes, the P38 has some pretty easy guns to master. It's a very forgiving set-up. I fly the F4U, which with the wing-mounted guns throws a whole lot more complications into the mix. Then again, the F4U has .50's, which are again, pretty simple to master. Of course, the P38 has those too... The tracers will only hide the target if you're firing in long bursts, in my experience. Even in long bursts, I can't remember a single incidence of the tracers making me unable to see my target.
Also your shooting style makes a difference. I'm used to flying a hard hitting guns package and killing with a single short burst. Tracers are of little use in that situation.
Unless you miss... Tracers aren't supposed to do
anything except give you a very good idea where your rounds go
when you miss. When you hit (which accounts for a small percentage of the rounds you fire) you have no need of tracers (or any other input as far as where the rounds you fired went.
The short burst idea is definitely a winner. I'm sure anyone with a decent proficiency in gunnery is using the same tactic. Long bursts would
generally drive your hit percentage down, because statistically, you're more likely to miss than you are to hit (some exceptions, of course).
But I still believe if tracers are useful, you are firing too far away. At 200 yards and closer tracers are unnecessary. No tracers requires the discipline to drive in very close before pulling the trigger.
Turning tracers off does not force you to get in close. It doesn't force more discipline. It forces you to do one thing, and one thing only... It forces you to guess. And guess again, and guess again. And again. And again. they force you to
guess, because you have no way to
know. You have nothing but a guess as to where the majority of the rounds you fire go. A small percentage hit the target, sure, but where did the rest go?
Say you fire at a target (without tracers), and you miss. Where did your shots go? High, low, behind, in front? How do you
know? You don't... You
think they might have gone low? So aim higher... Ooops, still missing! Where do you aim now? Lower? What if you
were low, but when you aimed higher you didn't aim high
enough?
With tracers, if I shoot and miss, I
know where my shots went. If I don't know exactly, I still have a very good estimation. If my bullets miss low, my tracers aren't going to go over my target. If I don't lead enough, my tracers won't pass in front of the plane I'm shooting at. I don't "watch" my tracers, I just see them peripherally. However, when I need some factual input, they're right there.
Honestly, having tried both ways, I'd say that without a doubt, the tracers are more important than your sights are. If you want to get rid of one, get rid of your sights, and leave the tracers on. For the vast majority of your shots, the sights aren't much help anyway. Often, they're just plain misleading. Not so with the tracers...
Tracers also shouldn't be a real issue when it comes to "warning" the other pilot. Unless of course, you're missing, or shooting from too far away. Even then, all the tracers in the world shouldn't matter if the other pilot has any SA at all. He should know you're there LONG before tracers would play any role. If he doesn't, you really shouldn't be missing, either. Personally, I've lived through FAR more engagements due to the other pilot having his tracers off, than due to any warning tracers have given me. Actually, my confidence level goes up drastically as soon as I realize my opponent has his tracers off.