Alton Brown's Pressure Cooker Chili

I got this from Good Eats Alton Brown - he did 2 versions - 1 in the pressure cooker and the other he put in a heavy dutch oven and finished the cooking in the oven at 350º for at least 6 hours. He also did 1 pound each of the three meats, beef, pork, and lamb, but said that as long as it was 3 pounds total it didn't matter the combination.

3 pounds stew meat (beef, pork, and/or lamb) 2 teaspoons peanut oil 1 1/2 teaspoons kosher salt 1 (12-ounce) bottle of beer, preferably a medium ale 1 (16-ounce) container salsa 30 tortilla chips 2 chipotle peppers canned in adobo sauce, chopped 1 tablespoon adobo sauce (from the chipotle peppers in adobo) 1 tablespoon tomato paste 1 tablespoon chili powder 1 teaspoon ground cumin
Place the meat in a large mixing bowl and toss with the peanut oil and salt. Set aside.
Heat a 6-quart heavy-bottomed pressure cooker over high heat until hot. Add the meat in 3 or 4 batches and brown on all sides, approximately 2 minutes per batch. Once each batch is browned, place the meat in a clean large bowl.
Once all of the meat is browned, add the beer to the cooker to deglaze the pot. Scrape the browned bits from the bottom of the pot. Add the meat back to the pressure cooker along with the salsa, tortilla chips, chipotle peppers, adobo sauce, tomato paste, chili powder, and ground cumin and stir to combine. Lock the lid in place according to the manufacturer's instructions. When the steam begins to hiss out of the cooker, reduce the heat to low, just enough to maintain a very weak whistle. Cook for 25 minutes. Remove from the heat and carefully release the steam. Serve immediately.