Leaves curling up and down? Help! *see pics*

Ok i need some help with this. It is my first soil grow and i am using MG moisture control, PH'd water at 6.6 and a 400W HPS. No nutes right now. They are about 3-4 weeks old too. I think that this was caused because they were root bound but wanted someone else's opnion. They were started in about a 5" pot and stayed there for the first 2-3 weeks, but then they started to get the claw. I thought it might be the PH at first but that seems to be fine, then the bottom couple of leaves started to wither and die and it looked like the plant was drawing out the nitrogen in the lower leaves.

Well i checked the roots and that point and it was obvious that they were root bound so i transplanted about 4 days ago. the pics were from today. But the leaves up top started to taco and point up before i figured out they were root bound. some of the other leaves were tacoing down too on the same plant. This is only happening with a couple plants so im hoping it was just a side effect of being root bound and not something specific to those two plants. There is no burn and no other issues just some funky leaves. thanks for any help, i hope the pictures are good enough

They are probably just in shock for a few days....watch for hermies when you start to flower...

Thats what im thinking because its only affecting the growth that was going on at the time that they were root bound

ya my lower leaves are dying and upper leaver are doing the same thing.
is it root bound or heat stress

Def because it was root bound then bc its not heat stress my light is probably 3-4 feet away at the moment plus i have fan blowing over them 24/7.