I don't know much about steroids. Here's a hypothetical scene...
An novice weightlifter can only squat 185 pounds. His goal is to squat 500 pounds. Considering that he is at the right age and is not overweight, he does steroid cycles. But he doesn't go all the way. All he uses is testosterone and testosterone alone. No Anavar, no Dianabol, no Winstrol, none of that. Just pure testosterone.
Assuming his training programs are excellent for him and he has excellent diet, how long will it take before he can finally squat 500 pounds?
(If it matters, it's an ATG squat...)