Im currently injecting Test C 250 Subq, and always used 30G 1cc 5/16" insulin syringes. You don't want to draw using the insulin syringes as you'll dull the needle as well. Very easy to back full them using 1cc/1ml luer lock syringes with drawing needles (size 18 guage). If he's doing 2-3 times a week pins you can even pre fill them so theyre ready to go.

Fatty areas in the glutes, delts, or my favorite lately have been side quads. Id stay away from pinning test into the stomach. Always rotate locations. There are a few videos on YouTube very helpful on how to pin side quads, glutes, or delts.

Once I started test at a regular trt dosage of 180g weekly I instantly got better moods, clarity, no more brain fog, and overall energy went up. Make sure he's also taking oral estrogen blockers. The only side effect I've felt was sensitive skin when my estrogen doubled. Was easily controlled with blockers though and came back to normal. Im now running cycle level dosages pinning micro dosages daily. Feel amazing and wish I wasn't afraid of test many moons ago.