I'm not sure

The only time I have tried to do a roast in my slow cooker the meat few completely apart when I tried to take it out so I ended up turning it into a thick soup!! I did put water in it and cooked it for a long time.

I have done lamb shanks in the SC and I browned them first and put them in with some canned tomatoes and herbs and they were very nice and moist but did not fall completely apart!

HTH...probably didn't tho