I've been using Biotech's TS-400 for 1-2 years now sub-q. A 0.5ml inject may too much for many, I usually use 0.25ml and below....maybe 0.3ml at most, for myself. Right now i'm using 0.10ml (40mg) ED.
If i were using 0.5ml, i'd just inject intramuscular, with a slin pin into the quads or shoulders if lean enough.