Originally Posted by eGGz
If it is going to be painful it will occur the next day and could possibly last for several days.
I have never used 330mg/ml test before. I have read threads with others mentioning that they are experiencing pain from t400.
The oil is not painful, it is the solvent that causes the pain. The higher the concentration the more solvent needed.
If you are getting Test @ 330mg per ml I hope it is not painful for you. I'm using Test E @ 250mg/ml and it is not bothering me anymore. However when I first started using Test E @ 250mg/ml it was indeed painful especially when injecting into a virgin muscle.