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Math is not the issue here. You're trying to use an algebraic equation to extropolate what your lifting max will be, but you're leaving an important factor out of the equation: physiological capacity. The human body doesn't follow math equations when pursuing performance, but rather relies and depends on things like age, fitness level, genetic pred-disposition, musculature, pain threshold, etc.
If an athlete's potential for peak performance were merely a matter of algebra, then a guy who cut his mile time from, say, 8 mins. to 6 mins. in three months could expect to run a 4 min. mile (damn near a world record) in another three months. Obviously, this isn't the case. And it prolly won't be the case for your 500 lb. press either.
BTW: I offered this advice at the risk of "being had" as I have an inkling your questions may be at least partially jokes. Like the one about the protein shakes? Six? Really? Surely anyone even modestly familar with fitness and nutrition would know that's totally absurd.
Anyway, just my two cents. Don't worry about your results so much. Strive for improved fitness level and quality of life. And remember to have fun!
didn't anyone notice the OP answered himself? In post number 2?
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