Painful injections

[PIGPEN8181]

Would the length have to be 1" or 1 1/2" for the outer quads, biceps, calves, etc. Or depending how much fat is there around the muscle when injecting so the injection doesn't get too far into the muscle?

[kleaver]

Would the length have to be 1" or 1 1/2" for the outer quads, biceps, calves, etc. Or depending how much fat is there around the muscle when injecting so the injection doesn't get too far into the muscle?

i use 1 inchers for quads, calves, delts, and my flexibility sucks so it's hard for me to do traps/lats... so i don't do them.
bi's and tri's i use 5/8, but only b'c im paranoid about going too deep, even though 1 is probably fine