I make sure to take my time, prob a lot more then need be. 4-5 min for every cc. I aslo pull needle out a millimeter as im injecting to spread out the oil a bit.
If it was prop then that is typical. Virgin muscle will knot up for a few days and can hurt up to 5 on enth. 3rd. watch for infection. Usually pain from a shot comes within 24 hrs. If u get flu like symptoms or other signs of infection get it taken care of.