For whatever it's worth (which might be nothing if nobody here believes me lol) highest I've ever pushed my injectables TOTAL is like 2.5g between everything. About half of that is test. GH has been as high as 10 iu of generics and lantus has been up to 40iu in the morning (when I had higher fasting blood sugar).
I've seriously considered pushing those numbers higher in the last few months, just to see if it would make a difference, but I'm not really confident it would. That's plenty of drugs. it's not like 3, 4, 5 grams of shit like some guys supposedly use, but it's plenty.