I have injected prop, tren and test in the past using a 23 guage for my quads. The prop always hurt. The cycle I am on right now I am injecting test, deca, and eq into my quad and weekly into the inside tear drop of my right leg. 2ml of it into the tear drop b/c i have a lot of atrophy from a gunshot wound in that leg and I am trying everything that i can. (I need to post about that and see what kind of ideals that others have about trying to improve the overall mass and structure compared to the uninjured leg.) The single biggest improvement I made in quad injections is switching to a 25 quage
needle. It is smaller and more accurate and you have to inject slow. Plus I only inject immediately after a shower so that all my
veins are up and I can see them. Very important in the spot injection.