KeithG, pork chops are lean with little or no tough interconnecting tissues. On the other hand, chuck roast is just the opposite, tons of tough tissue. That tough tissue starts to break down at 130°. At 130°, it takes 48-54 hours to make the chuck as tender as your pork chops. The higher the temperature, the shorter the time. Braising raises the temperature well above 200°, and it is my belief that when it comes to meat, temperature kills flavor.