Propionate is painful not because propionate is painful, but because testosterone is painful. Prop has a molecular weight of 74 to testosterone's 288 for a total ester weight of 362. This means that your testosterone is 79.55% pure test versus, enanthate's weight of 130, or 68.89% pure. The lighter the ester, the more pure the test, and the more it will hurt. Have you ever tried Test suspension?