I've had them go as little as 4 hours and as long as 7 hours depending on size of butt and lighting method. I pull at 160 degrees, spray with apple juice and wrap in foil. Then it goes back on to the PB until internal temp gets to 190-205. I start monitoring more for feel starting at 190. Cook varies all of the time. Iv'e done them in rain, snow, wind and sun. Too many variables to lock down a time. That's just my findings.
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