The flash hole in the nickled case looks overly large to me...you did not enlarge it for some reason did you?
Whoops! read the part I missed where you drilled the flash hole. You are asking for trouble if you shoot those rounds. Where in the hand loading books did it tell you to do that?
He only did that on the case he uses as a cake cutter - to get the excess lube off the bullets, before sizing. Drilling the primer pocket allows the nail to pass through.