It ONLY depends on two things, nothing more, nothing less, and those two things are how much Benzyl Alcohol and Benzyl Benzoate (percentage wise) is used when compounding the test prop hormone powder to make it suspend in the base oil. That is it, plain and simple. It has nothing to do with threshold of pain or if the gear is bunk or weak or anything thing else. There is only 4 things in your bottle of test prop. Test prop powder, Benzyl Alcohol, Benzyl Benzoate and oil. Thats it.