Today I decided to give a 29 gauge insulin pin a shot (literally)
The 29 drew just like the 25.
I pinned calf and was amazed at the injection. The needle slid in with very little force.
The injection was also extremely fast.
I am using Teva Testosterone Cypionate in cottonseed oil 200mg/ml.
The only issue I had was that I couldn't get the last little air bubble out of the syringe before injecting...