Pellets new and the ones that came with the smoker. I’ve pretty much tried every combination. It’s at 5/25 now and seems to be a little more stable but still huge swings. Below is a pictures from ThermoWorks thermometer as you can see the swings are from 230 to over 300 with the unit set at 265. It also produces a LOT of smoke too much in my opinion. I’m afraid my brisket is ruined but we will see another few hours to go