Not sure if needle is big enough for i.m

[tjax03]

you sure? i never did pecs, just glutes and quad once(hurt like hell for 5days) glutes arnt squat4 me, but where in the pec?

I pin my pecs pretty much in the middle of the muscle. Just find an area with a nice bit of muscle. It's probably best to stay away from the nipple area though as that skin is pretty tender. Also I have found that it is less painful if you slightly flex the muscle as you penetrate the skin with the needle. It helps the needle to penetrate the skin more easily. As soon as it goes through though you should relax the muscle.