So, yesterday I tried my first bone in pork shoulder. It was a 4-5 pounder. I used the Jeffs rub night before and put it on about 8am. Smoked it for 6 hours @ 215-230, pulled it out of the smoker and wrapped it in foil and into the oven for another 3 hours @ 220 degrees. I wanted to get up to 190 degress internal temp but at the 9 hour mark I was at around 175. Turned the oven up to 250 and within another hour it got up to 185. I opened the oven leaving the shoulder in there to let it rest. Internal temp imediatly started to drop, I was thinking there would be some carryover heat getting it up to 190. It didnt pull at all. I had to chop it to serve it. Im not sure what I did wrong, maybe not long enough? Could it be my smoker? I have a propane vault style smoker. I am using digital thermometers for both internal temp of mean and I have a probe in the smoker itself to maintain temp. Any tips, advice, suggestions would be great. Thanks in advance.