I'm getting a little frustrated, and figured I would turn to you guys for some help. I have tried smoking 2 Boston Butts, but both have been underwhelming. I've done the rub, and put in a bag overnight on both. Smoked both at about 250. Pulled both when I thought was the right time. I have not wrapped in foil, but will do that next if that's what ya'll tell me to do. That said, both have had really nice smoke rings, and a nice bark, but really don't seem to get tender, and certainly don't "pull off the bone". Can I have some tips guys and gals?