Pellet grill and smoker.

I did one like that also today. Along with pork belly slices and country style pork ribs for pulled pork. I do my chuck roast at 235 until it reaches 160 and then wrap in butcher paper and cook until it gets to 200-205. Then I wrap it in several beach towels to rest for 90 minutes. very tender. Always just rub on my meats, no sauce for cooking

I kept mine between 250-275 for about 6 hours. Wrapped at 170 and pulled off at 195. Hour and a half rest in the cooler.