yeah hitting arteries is definitely not impossible, not reccomended? absolutely.
to those who don't know the problem with hitting arteries besides the fact it will hurt like you are hitting a nerve, is that they go away from your heart. when you hit a vein the drug goes towards your heart, getting diluted along the way, then back out into your circulatory system and up into your brain. when you hit an artery it goes directly, relatively undiluted, and at high pressures, away from your heart and towards your hands and feet. the arteries get much smaller and eventually end, where oxygenated blood delivers oxygen to these extremities and then through the small capillaries bar oxygen before being brought back to your heart via your veins. if you inject something that has small microscopic particals due to being filtered by a piece of cotton or even most micron filters, these small particles will clog the capillaries and you risk losing your arm due to gangrene.
so the moral of the story is, if you are desperate to hit a vein, and you go too deep and feel a sharp nerve pain, pull out for fucks sake. getting that high that will wear off in a couple hours is not worth getting that gangrene that will make your arm or leg fall off in a couple days.
my work here is done, harm reduced.