Reconstituting ghk-cu 50mg

Hi all I’ll be reconstituting a 50mg ghkcu vial, I have two options which is to reconstitute with 2.5ml bac water which is acceptable but apparently can hurt when administering the peptide.

Or I can reconstitute it with 5ml bac water which makes it easier to administer with no pain. How have you all been doing it and what do you prefer?

First time taking ghkcu.