Using a vial for 50+ days doesn’t bother me, but I use Hospira and maintain good vial hygiene. (I’m not going to go as far as saying “sterile practices” because I’m not using a hood or anything, but I’m reasonably careful.) If I have a vial of Hospira that was already 60+ days old, then I will crack open a new one to use rather than reconning a peptide that will take a long time to consume. (I’ll use BAC for 90+ days, but I probably won’t use 90-day old BAC to recon something that will then last another 50 days because, for me, that’d be pushing it too far. But I’ll keep using that older BAC for vials that go quickly if I have any I need to make up at the time.)
Everyone has a different risk tolerance with this. Whatever you choose is your choice. Just sharing where mine is.