You can't think of it as a single 14.5 lb hunk of meat. Those butts should have taken 10-12 hours to reach 200-205 IT. 5 degrees can make a big difference.
You may have taken them off too soon.
I did a half butt today (4 lbs) on my kettle and it took 7 hours to get to 200.
Very tender and pulled easily.
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