Can I ask what SS316L builds you are using at 1300 and what temp setting, as I have had problems with the default TCR values on the Drag and was wondering if it was my builds.
I have 0.3mm SS316L, running a single coil in my Goblin Mini V3 at 0.55 ohms, and dual coils in my Doge V3 ohming out at 0.42 ohms. I found I had to either bump the temp up into the 500's or just suck really really hard to get anything (the temp control seems very sensitive to how the airflow cools the coil), even with the SS TCR at a max of 1600. This is with the firmware 1.0.0.1.
But I then used the software to put TC mode onto the drag (and took off TI mode as I don't use titanium) so I could play with the full range of values, and found a much better SS316L vape for me with my builds at around 420F, using a TCR value of around 1800.