It seems like the 24 hours of darkness may have helped initiate flower a little sooner since I was able to identify 2 females on day 6 of flower.
EDIT: 7F plants 1 & 2 look like they're herms, pistils towards the top but seeds developing below. Seeds on plant 3 too. Since it was bagseed it's possible the 24 dark period set off the unstable genetics. I'll probably stick to feminized seeds and clones from here on out.