I primarily use Tri-x @ asa 200 in HC110 which require exposures of 2 to 5 minutes @ f22 to 32. I have also used Tmax 100 asa 50 as well which requires twice the exposure but prefer the tri-x because of its lower threshold. Use a spot meter to determin exposure and do not be afraid to place the high values on zone vii or viii. The best thing to do is experiment to get the feel for it. Keep good records so you know what you did right or wrong.