I did my first big pork butt last Friday. 9.5 lbs from Sam's club. I asked for an 8 lb'er and they gave me 9.5. I was under a tight time frame, so I cooked at 275-300 for 6-7 hrs, then foiled for an hr until it was 190-195 degrees depending on where I stuck the thermometer into the meat. I was surprised I could finish it in such a short time.
To begin, I trimmed the butt, then put a small amount of rub on. Then I slathered the whole thing in mustard and reapplied a bunch of rub. It's true you can't taste any of the mustard once it's done. Foiling it ruined some of my bark, but I had no choice. Oh yeah, I also injected it with 2 cups of a combo of apple juice, apple cider, worcestshire, and water.
My rub consisted of turbinado sugar, brown sugar, paprika, pepper, kosher salt, onion poweder, garlic powder, and cayenne. It's perfect for my taste buds.
When foiling, I put a half bottle of stubbs pork marinade in the foil around the butt. I didn't pour it over the butt, just around it.
It ended up great. I seperated the money muscle meat from the rest and ate that separetely.
Here it is rubbed.
1 Hr in
5 Hrs in
Done. iPhone pic and poor lighting doesn't do it justice.
Pulled
ETA: used apple wood chunks