I think it's very hard to equate a certain test dosage to a percentage strength gain, so many factors involved in "demonstratable strength." Certain experts argue any dosage of steroids "only" give about 10% extra on the powerlifts. That's a naturally maxed out powerlifter going on steroids. For bodybuilding the difference is night and day. For me, orals are more effective for strength, like Anadrol and Dianabol. I actually watched an elite powerlifter go on steroids after he stopped competing and he gained about 10% on the raw powerlifts over a couple of years of cycling.
I just lost 13 kilos over 2 weeks of being in the hospital. I think I could be fully back in 3 weeks if I wanted to with GH, insulin and a little test.
Not my experience then. And just observing natural power lifting vs enhanced the number difference is more significant than that. And sure, "the look" on steroids sure is different. Because of other factors than just muscle fiber size increase. Things like increase in blood volume, blood pressure, water retention etc. Increases the swelling size of the muscle.
Anyway i just googled a study of 600mg of test anministred to 40 men. The strength avg increase of their bench was 22%. Squat was 38%(!). So avg increase in strength 30%.
My strength increase @300mg- +15%, their strength @600mg- +30%
Pretty telling for me that strength is very much correlated to dosage
