If you're having trouble with aiming, I've never seen how turning your tracers off would help.
As someone whos taught many people how to shoot effectively in real life, one simple aspect has always come into play. They always need to know how they've been shooting, in order to see where correction is needed. The feedback of where past rounds went is vital. In real life we use a paper target for that, in air/air we use tracers for that. Once the basics are learned, that can be dispensed with, but getting rid of it too early results in a much longer, more discouraging learning period. And at the end of it, I can't say the student has mastered shooting any more as a result of a tougher learning period, but rather that they simply take longer to reach the same point. And taking longer to reach the same point allows the other student to progress even further beyond that point. I guess I don't see the advantage.
Imagine shooting at a flying clay target with a .22. Bird flies by, you fire and miss. Why did you miss? High, low, too much lead, too little lead, not swinging through? No feedback, since your bullet left no lasting mark on the sky... Now try again, but lets change the angle and speed of the target. You miss again. Why/where? What do you need to do to hit the target? Lets try again, but lets change the speed/angle of the target, and pull you around on a cart. Did you miss again? Why? Even if you do manage to hit one, why did you hit it? What did you do right? Or did you do something wrong that allowed your incorrect aim to result in a hit (held your cheek off the stock, maybe?). That could make things even tougher by teaching you to repeat the incorrect aim.
When shooting at flying clay targets with a shotgun, we even have feedback. Two forms come to mind. One, the flying wadding (even though it's not terribly reliable/accurate, it does give a rough idea...). And two, experienced shooters looking over your shoulder and giving feedback.
Is it possible to learn to shoot with no feedback? Yup. But it's time-consuming and discouraging. If we made the .22 rounds visible in flight your learning would be much quicker, and much less random. Even if the .22 round was visible, but not exactly accurate in it's perceived flight, it would be more helpful. For example, you could learn that the round needs to "appear" to fly directly in front of the target for a hit. You can easily progress in learning because you'll find your tracers going consistantly behind your target, or above it, etc, and learn to correct for that tendency. You can't do that without feedback form previous rounds fired.
What can you learn with no feedback? How quickly would you learn math if you were rewarded for correct answers, ignored for wrong answers, and no feedback was given for how you erred on the wrong answers?
I'd get closer, leave your tracers on, try the Lead Computing sight, and start trying to figure out where you're consistently missing, and why. Learning what would have made your past rounds hit will tell you exactly what you need to do to ensure hits in the future under similar situations.
