One of my long time customers said that the recent product from Chapman (ordered ~3 weeks ago) was not as good as my usual quality, I have no reason to not believe this repeat customer (for years) would lie to me about quality. Did chap produce a low quality batch of mdma? It looked good, mostly rocks, but some one of else who tried it had to take two capsules of about 120mg to roll sufficiently. Has anyone else had potency problems with this mdma?
Could be a lot of things, tolerance, setting, etc. You can't roll often and expect to roll off the same dose. Only thing you could do in this situation is send it off to EC to test the purity. I would bet that your customer is rolling too much though.