Ok, after reading through the thread that rice721 provided and doing some testing of my own, he's 100% right. Although I didn't get a dry hit at 100w and 200Fon tc mode using tcr, it wasn't because the mod was regulating temperature for sure. I'll chalk the lack of a dry hit up to the coil and wick being able to take that kind of wattage. It hits as if completely unregulated when using tcr.
The only time the tc actually works is when using the presets, just like rice stated. Also, the ss 316 preset provides little to no vapor unless ramping the temp up to around 500F. The weird thing is, if I use the preset for ss 304 on a 316 wire I get a nice regulated tc vape at about 420F or so.
Hopefully a firmware upgrade will resolve this but I'm skeptical at this point.
As far as MY experience goes with vaping on various devices(Wismec, Joyetech, Smok, and DNA) it's quite normal to have to play with the TCR a bit. For example, I use SS316L at a TCR anywhere from about 92 to 108. So, based on what I have experienced, and also read....your experience with getting little to no vapor with the correct SS316 (TCR of 92 under the covers) and changing it to SS304 (TCR of about 105) is spot on from what I know....
Stainless Steel / SS 304 : 0.00105
http://vapingg33k.com/how-about-a-t...apemeet-ecig-vapestagram-vapecommunity-vapef/
Stainless Steel / SS 316 : 0.00092
Stainless Steel / SS 317 : 0.00088
Stainless Steel / SS 410 : 0.00155
Stainless Steel / SS 430 : 0.00138
I've read that the resistance change because of increased temperature on SS is so small, that even minor variations in the chemical make of the SS can effect the TCR setting used.