Not sure why, but 25G is just too damn small for me these days. Part of the problem is my reach has shortened (a good thing tho

) and so the angles have become more extreme meaning I really have to press the plunger hard in an awkward position sometimes resulting in a cramp.
Everyone is always talking about how a higher gauge needle makes less impact and thus less scare tissue and pain. I got to thinking tho: a small needle means high oil velocity upon exiting (bernoullius principle i think), which might be the source of much pain (kinda like water blasting pavement). Also a larger needle means less "exposure" time in the muscle, and less force required on the plunger which could solve the muscle cramp problem.
I decided today that, what the hell I will shoot with 18G. Overall it worked great, i think the best would be a compromise of my 21, 22, or maybe 23G tho, since 18G entry is rather difficult.