Hi guys! I'm fairly new to the smoking community, but I'm having a blast. I put a 4 pound pork butt in the smoker this morning at 11am expecting it to take about 6 hours to Cooke for pulled pork. I'm now at almost 9pm and the the internal temp is only at 172. I have bumped the smoker temp up to 300, but is this seem normal? I expected a plateau, but the temp is really creeping up slow. Any advice?