I have a situation. I have got GRE score of 324. My academics are pretty strong as well (5.1/6.0). I am applying for MS to US universities. In the process of gaining letters of recommendations, I do not have too many options. One of the professor at our department has pre-written letters, because he is busy most of the times. He makes rudimentary changes to it to make it suitable for each candidate, but the gist remains the same. From the experience of past students, he asks the GRE score and he somehow thinks that it is the only "good" metric of evaluation. So he has some 3-4 versions of these letters and based on a GRE score he selects a theme. I also came to know that if student is under 320, letter is excellent, that is, it is more balanced. And over 320, there is more of a high pitching.
I am not targeting many 1st class universities. I am more selective and I really do not want this bluffing. Obviously, I cannot reveal to him that I know his procedure of writing the letters and I need one for below 320. My question is, may I lie about my GRE score to him? When he gets emails from universities, can he see my GRE score? I definitely do not want him to know that I lied, at any point in time, even after admission. Are there any other options?