I use 27-gauge 1/2" needles, ususally called allergy injection needles. In fact these are the same needles they use at my allergist's office (Have to admit to lifting "a few" in the past!) They are perfect for bi's and tri's.
yeah i heard that too......i guess its all mental. I remember when i held the 23 gauge next to my bicep i thought i was gonna punch a hole throgh my arm......couldnt do a bi injection after that for a while.