Yes after all these years on TRT doing shots E3D works best for me and doing HCG the day before works great. I am 76 now been on TRT over 40 years an tried them all.This forum is pretty much dominated with self-injectors as weekly shots are almost archaic in that way, TRT has moved well beyond 1 weekly shot.
I use a 27g 1/2" lg. syringe and all I do put my dose into vile with air. I then pull the plunger all the way down and hold it this takes less then a min. to do a 40 mg. shot.Boy, you got a lot of good answers. I inject at home.
Look up using an easy touch insulin syringe. So simple and painless.