i had a lot of issues and I'm your same weight. I stopped doing the old hand test, now i exclusively pump with a hand pump. Different brands of tires can take different pressures, i also had troubles with the bead coming off from over inflation when I was first starting out. now i use 700x28 armadillos which have a max psi rating of 100. I take them to 110 on the back and 100 even on the front, and again, I'm basically the same weight as you. Your tires are narrower so they will require more pressure. I would put them up to the max and just make sure whatever brand of tire you have that they are capable of handling the high pressure. The stock kenda kwests that came on my bike are rated 85psi max, they never should have sold the bike to a guy my size with those tires on there. had a ton of problems with them the first couple of weeks on the rough nyc roads.