I'll just add that Sub-q will be similar to intramuscular in that if there is a particular solvent in the mix you are sensitive to, or if in high amounts, it will knot-up still, in some cases badly. Some of these sources out there these days, I don't know what or how much they are using, but i've had to toss a lot of bottles over the past couple of years.
A standard solvent/GSO mix, or something similar, is my favorite. Otherwise, it's hit or miss for me.
I recently used 10mg (10iu on slin pin) of some Mast Prop, and thought I was gonna have to go to the ER it swelled up badly for over a week. It cleared up, but I had tried some IM as well, and it was stupid painful. Both courses left me achy with body aches/fevers. I tossed that shit. Switched to another brand i've used for years, and it's smooth and no pain at 20mg/d sub-q.
I backfill a slin pin, 1ml, and take 10-20iu per day (or 0.1 to 0.2ml). So, it lasts me a good 5-10 day's worth.