I took my first shot of test prop today alone (have mixed with other compounds before) and it killed. Now I have read that test prop hurts when injected alone, but that didnt seem to be the pain, the pain for me what the pin going in. Now I have done many shoulder shots before and never had injecting pains. Could it be my needle size? I use 1'' 21g for shoulders and 1.5'' 22g for glutes. My glute shots dont hurt?