Sounds like he is feeding you a load of BS to me. If it is the same quality stuff each time, there would be no reason for the vast fluctuations in the amount that he deals you...

Weed should always be dealt in weight and not from visual. So either weigh it yourself infront of him and ask for more if its under-weight (he might get a bit funny about this and take it as an insult, but if its not under-weight then he should have no problems about it afterall...)

Don't accept any BS about 'but this is quality stuff man' Of course he will tell you that, he is a drug dealer, he is hardly a saint.

Or find yourself a dealer that doesn't mess you about.

Good luck :thumbsup: