I don't know where I originally collected Sandy King's pyrocat HD formula. After rebuilding my darkroom and organizing my formula sheets I find conflicting data: I have 0.2g potasium bromide recorded and see elsewhere 0.1g. I usually multiplied the formula by 5 to measure the potasium bromide more easily at 1.0 gram. Not sure what is official formula - though I would not change methods for consistancy, I am guessing with more pot. bromide the development would be slowed down?