I dont know, I dont have a problem with injecting into new places. I am only on my second cycle and my first one only had me injecting one a week. This time I inject ED and 3 times on some days. Instead of just glutes like last time, I am hitting gluts, delts, bis, tris, chest, calves. Calves hurt a fair bit, one a lot more than the other. but no pain no gain I dont like the pain, but I do like knowing and feeling like my body is on its way and so when i feel like there is still a needle stuck in my calve I just look at it in a positive way. Now I am trying PGF2a soon. So we will see how much I like needles after that! I will post a lot about that experience. Remember its all for a purpose atleast the pain makes you know you are moving forward. I get a great sense of accomplishment when I am on a cycle like this and I know I am dieting 100% correctly, resting and supplement correctly!
Sorry its long but I am all pumped!
PS My pec injections where fine with a 25 5/8 and with a 29 1/2inch great chest pumps the next day and no real pain. I have injected the outside and inside of my pec.