I had 35 g's of test base leftover that I got sick of playing with because it always seemed to come out of solution. I added it to my 100 g's of test prop so that made it 135mgs per ml of course. I used 3% ba and 20% bb and it doesnt' hurt at all. Probably high BB but I was just experimenting. I really like the stuff. 2cc's EOD gives me and extra 210mgs of test base per wk on top of the 600mgs prop. Good luck on your experiments.