Needles for glutes?

[MB101]

I re-open this topic without opening a new one since my question is pretty similar.

So, I usually inject testosterone enanthate (from pharmacy), 250mg/ml once a week in my dorsogluteal area.
So far, i did about 50 injections by using 23Gx1-1/2" and more or less I always get the area a little bit painful for at least 2 days.
I tried different solutions: heating the vial, changing the needle after the aspiration and before the injection, but even if the pain is reduced, it is still there for at least two days.

So, at the moment, I have these other needles:

25Gx1"
27Gx5/8"
30Gx1/2"
26Gx7/8"

Which one I could try to see if the post-injection improve?
I do not think 30G would be suitable, but what about the other?

25G is just the next size after the 23G that I'm already use, so I do not think it will be very different (??). What about 26G? probably it is too short for the glute since it is 7/8" vs 1-1/2" currently in use (I'm not fat, I'm 86Kg X 178cm)?

I don’t think it’s your needle size bro. You may want to look at a different ester like cyp imo.