I draw with an 18-22g(depending on availability)... then I switch out my draw pin to a 25g 1" - even being pretty lean I can get away with 1" in my glute but rather go with a 23g 1.5" spike.
As long as you don't go over .6ml on a subQ inj you'll be fine(no dote bumps etc) if you use a 1/2" slin pin or I use 5/8ths in my delts(plus if it's lower volume less than a CC then you'll be fine as some may go IM & some subQ - both ok!
How slow are you injecting? What's the concentration of your gear(Xmg/ml) If high concentration it's most likely virgin muscles and BA content imo... wouldn't be worth it to me to do a cycle and have to worry about each pin if it's going to effect your w/o's... try this - what ever you pin glutes etc hit that muscle to work it out - or delts are a better example

pin em & work em the same day!