Injection site guidance

My side delts will take up to 1 ml each without issue. For me PIP really depends on the compound, solvent and carrier oil used.

That varies person to person. I don't touch my delts more than once every 3–4 days at minimum — no need to keep pounding the same muscle when there are plenty of sites. I rotate between delts, quads, glutes (including upper/glute med), lats, etc., so no single muscle gets wrecked. But seriously, why are you doing 25mg four times a day? That sounds pretty high to me.

Last time I tried lats it was brutal — my arm hurt to move for days after.

I mostly stick to delts and quads myself. Quads have a ton of real estate, so you can spread injections out over that whole area.

Weird, I can push a lot of oil into my lats no problem. I start up high and work down the muscle on both sides and never get pain. Delts always sting for me though — maybe because I'm pretty lean through the shoulders — I just can't stand delt shots.

I'll give lats another try when I get home. I use 5/16" 30 gauge slin pins for my delts, so I'll try those in the lats too.