Is this Nute burn? plz help...

So is this nute burn? Something else? Here's the deal. My plants are looking pretty good overall, but i just changed the nutes 2 days ago and added Big Bud, but, i used the powder for the 1st time and went by the light feeding schedule. So here i am a few days after and i started to notice some scattered leaves that look like these pics. Mostly they were on the bottom, although a few can be mid plant. Some of the worse ones either fell off or were weak and about to fall off. I should add that at this current time, most of leaves look fine, its some random scattered ones that have me worried about the problem spreading.

So is the nute burn bad, and can a little bit of nute burn be ok? Or is it nute burn at all? Don't some people over fert on purpose mid flower to try and get big growth? My PH levels were fine, around 6 (5.5-6). I dont want a major problem especially since im a few weeks from harvest. O yes, and can i just add some water to bring down the nute strength or do i have to start over? I have a 70 gallon rez and added about 5 gals of water to try and bring down the stregth.

thanks a lot (i gave a lot of info so i hope i didn't just confuse people) - yota






you can look around and see that most leaves are ok for the time being -u can spot some spotty brown with some kean eyes
(and by the way, click the black bar to enlarge, not the picture)

nute burn.
cut down on the feeding sced.
also do you have a fan?.
and how often do you feed?.

but really your plants look ok.
but
too much food is no good.
feed every other water, every 6 days or so.

maybe, cut the leafs off that have the problum if there's only a few and do a flush and if the problum is still there you might be missing some micro nutes out of their diet, I just found out my girls is lacking in Calcium nitrate

I agree that it's burnt and you should flush. Remember to flush a week or so from harvest and give nothing but water. You will see your plants looking lke their going to die as they get closer to harvest, the leaves will use up all the nitrogen and yellow, remember this is normal and all will be good.....

cheers for pics mines gon the same

Thats not nute burn.
Nute burn is represented by crisp,dark brown, discoloration as well as i fit was at that severe level it would start on the inside of the leafs.
I'm gonna say potassium and calcium. Very few representation of the calcium deficiency but there is some.
And the weird discoloration is a potassium def.
That yellowing looks like a zinc def as well. But its not because i don't see any ridges in the leafs.
Taking a closer look at the plant i think your over watering it.
Are you letting the soil dry out in between watering?