The developing times using D-76 1+1 starts at 10minutes for tri-x. Try this first, Steven.
Probably not when shot at 200. That would not really solve anything, because it seems like the OP processed the two rolls together in the same tank, so whatever difference there is between the two rolls would be because of something other than the developer.
"Often moments come looking for us". - Robert Frank
"Make good art!" - Neil Gaiman
"...the heart and mind are the true lens of the camera". - Yousuf Karsh