first of all 300mg/ml is not worth it!. I have tried it and the volume of ba needed to break down that much, you are shooting straight BA. they dont come out like you want them too ever!
BA is simply used to keep bacteria from forming in solution so I guess in theory its possible if straight oil is used and 1%BA and 1%BB.
I have been successful with 200mg/ml but the sides far outweigh the gains. I was my own guinea pig. the pain in the area from muscle tightening from the acetate was bad, cramping and the emotional aggressivness was hard to control. I just let things get to me because of the pain mostly, nothing to blame on roids, so if you can make a stable 300mg/ml let all the labs know and me too because there is money to be made there if not PM me and I will give you a formula for a smooth but clean 200/mg/ml.
I didnt mean any misrepresentation on that, I tried it but its very hard to make it worth injecting, i dont recommend it..LOL