I think this is probably one of those rare cases as sub q injections have become quite popular. Additionally, there are plenty of IM injection horror stories so it’s not like one way doesn’t have risks.
That being said, I realized reading your post, I’m actually not necessarily doing sub q injections. I rotate delts and quads with a 29g, 1/2” slin pin. I did this with test p eod injections for over a year with zero issues. Doing test e now e3d.
To be noted I bottom out the needle and am at 22% body fat. So likely I’m going very shallow IM.
Take way is, regardless of IM or Sub q, why would anyone ever use something bigger then a slin pin?