(I usually use 2 or 3 but they are hot so start with one and see how spicy you want it)
Pat the chuck roast dry with some paper towels and then season it heavily with salt and pepper.
Cook for a few minutes and add the whole can of tomatoes, the chili powder, and the chipotles
Simmer the meat for a good 2 to 3 hours
shred the beef with a fork, pull it out onto a cutting board to cool a little bit