I like high doses, lol. Also it's the third day of my binge I needed an extra kick, haha.
But, yeah there's streetamphet circulating the streets that's 10% pure and stuff like that (probs even lower). I have tested the amphetamines of my connect multiple times though (through one of those dutch testlabs) and it's never been under 40% purity. Usually 50%+. I didn't notice any difference in strength between these amps and the amps I had tested. I have quite a bit of experience with amphetamines aswell so I'm pretty sure I'd notice.
I think it's safe to assume it was atleast 40% pure amps or higher.