Another danger is small vial rubber pieces. I used to draw with 20G because I had alot of extra ones. I always inspect the vial after I take it from a hot water bath in the sink (110F).
I noticed a very small peice of the rubber from the vial.
Now, I don't think it would have fit through a 25G needle that I pin with, but possibly a 23G.
I also inspect syringe with light after drawing.

I wonder how many have injected a small peice of rubber from the vial?
I now just take the time and draw with 25G, and pin with the same one.