Captain Morgan
Chef Extraordinaire
You are a-ok...you got 2 good looking butts that weigh a total of 13.3 pounds. Marbling is not a term I use a lot with butts! There's a bunch of fat in there that, when rendered, makes the butts delicious and tender.
Don't worry so much about the mathmatics of your cook. Lots of factors can determine how long these will take to get to temp. They might be done in 14 hours, they might be done in 20. It's done when it's done.
After you do a few cooks on your cooker in your environment, you'll get a better idea of how long cooks will take. I really don't believe it will take
more than 20 hours, because you have 2 pieces of meat there, more surface area means quicker rise in internal temps.
You will not screw it up. Butts are the most forgiving piece of meat on God's green earth. Have fun.
Don't worry so much about the mathmatics of your cook. Lots of factors can determine how long these will take to get to temp. They might be done in 14 hours, they might be done in 20. It's done when it's done.
After you do a few cooks on your cooker in your environment, you'll get a better idea of how long cooks will take. I really don't believe it will take
more than 20 hours, because you have 2 pieces of meat there, more surface area means quicker rise in internal temps.
You will not screw it up. Butts are the most forgiving piece of meat on God's green earth. Have fun.