I've had chuckies go up to 212 before getting probe tender. Next time, just put it back in the cooker till it is tender.
Most pepper stout recipes call for loosely pulling apart the roast and letting it cook longer in the juices and veggies as I recall.
Modded Brinkmann Gourmet. Basic UDS. Rescued 22.5" OTS. Weber SJS. Stubbs. B&B Oak Lump.
Cannondale 2009 F8 (for burning off all the great BBQ)