Pork Butt Anomaly

Mine usually are done and nicely rendered in 12 hours, maybe a little more. I have an SM150. I recently clean up my SM150, been a while since I got it and I scraped it down and bored out the smoke hole up top. I noticed the next couple smokes went a little faster, by any chance have you cleaned your unit recently ?? The units smoke much more efficiently and quickly when there is good airflow. That means that drip hole on the bottom is not blocked or gunked up and the chimney or smoke hole is open

Like BigMike says,his cooker runs a little different than yours.

I guess you checked the exact temp at the spot you had the butt and it was 225?
Seems like my cookers do 8 lb,never frozen,young market hog butts in about 12 hrs, if I have preheated to cook temp.

I guess you never opened the door?
You had checked the calibration on your therm that the internal temp was 195º?

I calibrate five wired therms for each cookoff.When we get there,one will be off five and another 8-10º.

Sometimes hawgs just can't read a therm.