300 is a very high dose and not safe to do on a campus.. If you take a higher dose, there won't be much of a difference because your brain can not squeeze out more neurotransmitters than it has stored. Taking more acid at a later point is not going to intensify the experience much. It will just drag it out to be longer. Immediately after taking the initial dose, the body builds a high tolerance that lasts 1-2 weeks. If you do what OP did, you set yourself up for a super long trip(at least 12 hours) that is not possible to control to begin with. Unless you are a shaman sitting in a tent in the middle of a jungle.