Yes, winny shots are uncomfortable. Actually, I've found glute shots of stanozolol to be the least uncomfortable, and quad shots to be the worst. I've found deltoids and trap shots with a 1 inch pin to be decent. Sometimes the delts swell for a nice round appearance, at least for a few days.
In any event, the aqueous suspension can irritate the area surrounding an injection and in some instances the skin can develop a rather large red blotch.
Most male athletes use 50mls ED, which works out to 1cc if your gear is 50mls/ml.
RW