Pork Butt shrinkage

40 to 50% is common, I've seen 60% but not often. Cooking at 225 to 250� expect 50% and you should be safe.
Jim

Mine has been right around 50%.

Stogie

Smokin'

I find in a cs smoker that you will run between 35 and 40. There is a little difference depending on the temperatures you are cooking at. And some differnce depending on the product itself.

I have found that if you use smaller butts and smoke at 225 you get less shrinkage (about 5%) than if you cook larger ones at 250...