Damn I could never pin calves or bis, but I'm gonna start hitting my quads and ventro-glutes with slin pins (or 27ga 1/2" needles on my regular darts) as soon as I lose some more fat.I used to inject test prop in my calves and biceps with a slin pin. Run it under the faucet a little to get it a little warm. I don't think I will ever do that again.
Btw if you guys aren't shooting your ventro-glutes you don't know what you're missing.