How many mgs does SWIY do?

[Tortoise]

Enrico was wondering.... When people on these forums state they've taken a certain amount of codeine how accurate are they? For instance, if Enrico does a CWE starting with 300mg of codeine, he knows that the end product is likely to contain only 75% of the codeine that he started with, ie 225mg (just measure the amount of water you start with and compare it to the amount you end up with following CWE). So, when he reads reports about people taking 300mg of codeine are they really ingesting this much, or is it simply the amount they've started with?