Yo Bo, ppl can dose Test E or any other compound at whatever they want...within reason. I say "within reason" because short esters tend to not hold at high concentrations i.e. Test prop at 250mg/ml. You'll never see test prop at that concentration because it simply will not hold at that dosage with grape/cottonseed oil ba/bb alone. Some try to use a thicker type of oil to hold it and jack up the BB ratio but you don't see it often, as it would most likely hurt quite a bit
Now, if your test is in fact 500mg/ml, then he probably did use this thicker oil to get it to hold. That will mean you should shoot .5ml/cc twice a week to equal 1ml or 500mg a week.
Saying "Test enanthate is 250mg/ml" just isn't a correct statement. You couldn't pick up any bottle of test e and say you know it is 250mg/ml. Sure, that is the most COMMON way to dose it at, but by no means is this a rule.
Just make sure you read the label
