Sub Q is correct, but I do believe you can go IM. I don't see why you would want to though.
Some people are projecting that IM will get absorbed faster and produce faster/higher spikes. That's the only reason for going IM that's I've heard of (and some people actually prefer IM injections to SubQ).
What size pin do you use for these?
Same as you would for GH. 23/25 either 1'' or 1.5''
Edit: ^^ Sorry, I misunderstood you. That's for reconstitution of the peptides.
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