Superstore had outside round roast on for $2.98 a pound a week or so ago. Should have bought a couple more. Even after 8 hours in the crock pot outside round is often dry and chewy, no fat, but 45 minutes in the Instant Pot pressure cooker along with 6 big potatoes, 3 monster carrots, a quartered onion, splash of Worcestershire, packet of dry onion soup mix, 2 bay leaves and 2 cups of water it came out fall apart tender so much that you couldn't really slice it . Thickened the liquid for a gravy with a bit of flour , leftovers tonight Lovin the pressure cooker, definitely worth it for soups stews and chilis, made from dried beans is way better than canned beans.
edit: there was a stalk of celery in there too, like the flavour it adds to stew and pot roast