because I know of a couple of cases that the powder that was recieve was ether a. bold base or b had about about 25% bold base content. ether would be a. very painful to inject regardless of mg/ml and b. almost imposible to get into solution with oil. bold ace is a pain in the ass anyway, if you want a short acting bold product use a cyclodextrin carrier. but to answer your question you should be able to get into solution at around 75mg/ml. granted this was done with homemade bold ace and in a "nice" setting. your going to have to use more BA then you would like, 5% min and 10% preferably (be careful, some people find 10% ba painful, it doesn't bother me much at all and 7.5% is fine for me)