Did you do a 2 hour foil wrapped REST after you took the meat out once it hit 201° internal temp???
2 hours, wrapped in foil, wrapped in a towel, and into an empty cooler... don't touch it till you wanna 'pull' it.
The only other thing it could be is the sauce or your rub.
I also use a finishing sauce:
A FINISHING SAUCE!!!! that takes care of all your juicy meat needs the 'day of"!!!
Per/10lb butt
1 Cup Cider Vinegar
3 Tablespoons Brown Sugar
1 good squirt of Ketchup
1 Teaspoon Course Black Pepper
1 Teaspoon Red Pepper Flakes
Warm the Vinegar up enough so that it dissolves the Sugar well. Then add the remaining ingredients.
Randomly squirt this over warm freshly pulled Pork, then kind of mix it up with gloved hands. This adds very little heat (despite the Red Pepper) and mellows out the stronger, gamier parts of the Shoulder. The Vinegar also helps break it down even more for some REAL juicy pork.
If you've never done Pulled Pork with a "Finishing Sauce" before, you're in for a real treat!!!!