I have a similar experience with SS316L TC on my DNA250C mods, I have both a Paranormal and a Drone. The issue I see, the DNAs consistently measure the resistance as lower than my meter, and two other non-DNA mods I own, one with a Hohmtech FSK chip, the other with a Yihi chip. The vape experience on the DNAs is weak flavor and minimal vapor. If I switch to either of the other mods, and do a cold resistance measurement, the vape experience is as I would expect. With my DNAs, I find I have to adjust the resistance up slightly and lock the resistance, to get the vape experience that I would expect.