i like to shoot both sides of tricepts ,bi are little painful,delts are nice and easy,quads are good for the big dose days,calves absolutely sucked ,pecs are ok sometimes i get bad shot but mostly its good ,didnt care for shootin traps hit a nerve on the 1st try that hurt havent tried lats or glutes as yet im still alittle fat around the middle .i use 23g 1" needles for all injections.i find that with some oils anything smaller is impossible to shoot or draw 23g is a good size for me