You can buy separate syringes and needles. You buy 1ml syringe for Leur Lock and you buy 30g Leur Lock needles. Yes IM can work. As for sharpness I don’t know. I draw with a 20g, swap it for the 30g, and then inject. The 30g takes a long time to load. To each their own though.
I draw and inject with the same insulin needle every time. No issues at all. I don’t understand using a separate needle to draw. seems like you are guaranteeing waste.
I draw and inject with the same needle as well. 1/2", 0.5cc, 30g, fixed needle insulin syringe.
When you’re dealing with like 28 or 30g needles, they’re so small it doesn’t seem to matter. They don’t hurt even if they are “used” twice (once for drawing, once for injecting)
It takes longer to draw but it helps reduce waste and is easy to do so that’s what I do.
It’s actually pretty simple to understand.
When I’ve drawn with the same needle that I inject with, the needle gets dull when it punctures the rubber on the vial. Then it was difficult to puncture my skin with it.
Insulin needle lengths are fairly short…around 1/2" at the most, so depending on your BF and where you inject it would work. Maybe not real well for glutes/quads but OK for delts for sure unless you have a very large amount of BF.
Also, for those concerned about how long it takes to draw the oil into an insulin syringe, I place my vial in a small sandwich bag and drop it in a mug of hot water. Leave it there for a few minutes and the oil is less viscous.
You can draw then inject it’s fine. Sometimes I back fill a weeks worth at a time but usually I forget and just use one during every morning. I really don’t notice a difference. Just make sure you push it through the middle of the vial rubber. If it’s off center and doesn’t pass through like butter then it could be dulled. Junkies use the same needle for days, sometimes between multiple people so I’m sure one use won’t critically damage the tip