When it comes to making pastrami, there are a few different cuts of beef that you can use. The most common cut is the brisket, which is a large, tough cut of meat that comes from the chest area of the cow. Other cuts of beef that can be used include the chuck roast, rump roast, and round steak. The key to making delicious pastrami is to cook the beef slowly and carefully. This allows the flavor of the spices to penetrate into the meat and also makes the meat incredibly tender. Traditionally, pastrami is smoked after it's been cooked, which gives it an extra depth of flavor. If you're looking for a truly authentic pastrami experience, then cooking your own at home is definitely the way to go. However, if you don't have the time or patience to make your own pastrami from scratch, then you can always buy pre-made pastrami from your local deli or grocery store. Just make sure to look for a brand that uses high-quality ingredients and doesn't skimp on the spices!