I can tell you if you are like most with the average genetic, there is no way you are at the top of your potential. If your goal is to total 1,500 in a powerlifting meet in the 220s, assuming you are equipped, you do not need any drugs to do that.
Most guys here come at things from their own prospective, I am no different. What I can tell you is I have been lifting hard since I was 16 y.o. My gains did not start to slow until I was 30 y.o. I topped out at 35 y.o. with my best official lifts in a powerlifting meet. That day was my "Day in the sun", and then my lifts just would not move.
Let me ask you this; If your goal is to reach your genetic potential naturally then you have a ways to go. Remember, 90% of the work is in the last 10%. The law of diminishing returns is a cruel one. Go this route and sooner or later you will consider yourself lucky to add 10 lbs to your bench and 20 lbs to your squat and deadlift in a year.
As reed suggested, jump on the wagon and see how far you can go. Drive up weight that makes other guys in the gyms eyes pop. But then you will never know what you could have done on your own.