Half an inch slin pin i dont really think gets IM. But i dont know, just by the feel i get from pushing it in.
slin pins are way too thin for feel them pop into the muscle imo...
when i was low dosing i was injecting 1ml ed into quads and delts with slin pins and never had any problems
UNTIL i got fuggin fat, like 17-18% BF or so.
i think ive gotten a few red swellings here and there on my quads, the gear might have leaked out into subQ tissue... like once a week or so.
even then never a problem in delts though