Lets say you are lean, can you inject winstrol with an insulin syringe lets say in an arm or delt? have you ever done this before or is it recommended?
I would not recommend that bro. Slin needles can be used for subq injections like GH but not for AS which are IM injections. You might hit a little bit of the muscle if you have no fat at all, but it will not be a deep muscle injection so it will not suffice.
You can try www.getpinz.com and purchase them online. I would use a minimum of a 1" 25g needle. If you can, it's much better to use a 23 g 1.5" instead especially with winny since it can sometimes clog at 25g needle if you did not shake it up well prior to administering it.
Aikido
Although I have not yet done this (starting in 1 week). I posted this question a couple of days ago and was told with the zambons a 1/2" slin pin should be ok with the bi"s and tri's. I would think that if you are lean it should be ok for the delts as well.
I would definitely not recommend less than 1". I used 1/2" 27G insulin syringes in my arms and shoulders and the oil did not dissapate well (I was even concerned about getting a sterile abcess). Use a 25G 1" it's really not that big.