its got 100 hits im sure, just that acid isnt as strong now as it used to be; well, still the same strength, but most people sell much smaller amounts as a "dose" nowdays
I know personally that you can trip for many many days if the doses are right i usually do that for week long and month long campin "trips" Ill stay dosed in the woods as long as i can handle, like other people said you just have to up the dosage.