avoiding pain, ha! lol!
First of all, the best advice is just learn to live with the pain and embrace it...I walk funny year round now
However, you can help the pain by cutting gear in the synringe with an additional 1cc of sterile grapeseed oil. This will lower the potency and increase the volume. The pain is caused by the gear crashing inside the muscle, after the oil dissaptes it leaves behind the powder because 100mg/ml is actually above the soluability limit of prop...i think the limit is 50mg/ml, which is why pharm grade is only made at this level. 2cc of 50mg/ml will be completely painless where as 1cc of 100mg will hurt first time use.