Testosterone is really a complex- VERY COMPLEX- hormone. It cracks me up that you guys consistently say the same shit- will 500mgs build 10lbs of muscle, if so will 750mgs build 12 lbs of muscle etc etc. As if this hormone could be broken down to a simple rubric which one could follow to build the desired muscle! Not!!!
Test has certain "threshold" dosages that I am aware of. Basically when you inject a certain amount of test some of it binds to the AR, some of it is reduced via dehydroxy-5 reductase (I can easily have that spelled wrong, doesn't matter, converts test to inferior DHT in many tissues throughout the body) some is converted to estrogen and some is simply bound up via SHBG and used for various metabolic processes.
The crucial point is- everyone is different! Meaning, some guys when they shoot test their shbg and other enzymes are low and the bulk is used to build muscle tissue. They explode on low doses. Other guys need much higher doses because their bodie's are better at-not building muscle quickly.
The dosing thresholds go like this-at 1g per week (regardless of ester) and above, almost anyone will see full androgen receptor saturation. This means they are building muscle at 100% of capacity (as far as test is concerned).
However, there will naturally be some spillover. If the AR is saturated, naturally other things happen. For the most part the bulk will be converted to estrogen or bound and basically wasted. BUT, and this is a huge and crucial BUT, there will also be enough left over to totally suppress CORTISOL. This is where the magical 1g per week number came from- it was theorized that at exactly that dosage (and higher) cortisol will be completely blunted.
If you are trying to build muscle, this is where you want to be no question.
What I might advise, which is very logical- run some Winstrol for about 2 weeks prior to running your test at a dose around 50mgs ED. Stack this with about 1.0-2.0mgs Letrozole ED and prime yourself with at least 4-8 IU's GH ED. Then, at around the 2 week mark, blast yourself with 1g or more of test. You will literally explode.
Guys taking 4-5 grams of test a week are wasting the majority of it and they don't even know it. With EVERY STEROID your body will reach a saturation point where more is not better. At this point you need to really look into drug synergy, but that is another topic.
I am not an expert, or guru, or even a pro, so take my advice at face value. Just some random guy on the internet...