my friend had a horrible experience with calves, so i dont think id ever try that
you guys should look into the ventrogluteal injection... definitely my favorite spot by FAR. easy to access, have never hit a nerve or vein, and completely painless (dont even feel a pinch, and never get sore after). i use ventro, delts, glutes, and occasionally quads, but im always a bit nervous to hit my quads cause ive heard so much about nerves.
ventro inject:
http://www.nursing-standard.co.uk/ar...18n25p3942.pdf
(acrobat doc)