Our resident getbigger “the scott” said he could squat 500+ for 20 reps just drinking a gallon of milk
My last day at a big gym that had enough weights to go around my squat routine was this:
Warm up with 135 and then 225. First set, 20 reps with 515. Second set, 20 reps with 535. Third set, 5 reps with 585 (just to feel something "heavy") and my final set was back down to 515 for 20 reps. If I had remained at that gym my next leg day would have started out using 520 then 540, 590 and 520. As I said before, I've seen Platz squat and he goes ass to grass while I go parallel or slightly below that. I was 6' 1" and Platz was not 6' 1".

His leg development was superior to mine but I could hold my own in leg work and have other personal bests from leg days gone by.
Outside of Platz I never met someone capable of squatting like I could. I am too old now and have a physical handicap (not related to exercise, LOL!) but getting to that level took me somewhere between 8 and 10 years of consistent squatting, leg presses (the real leg press, i.e., inverted on your back), leg extensions and leg curls.
If people don't believe me, that's fine with me, LOL!