The 501 is a great jean. It has been around for over a century and has been perfected over time. So there are two types of denim, sanfordized (pre shrunk) and unsandordized. Preshrunk Levi's are likely going to stretch 5% after buying it.
Buy a pair of 501 shrink to fits. Size up one in the waist to what you usually wear. Then put them in a tub with the hottest water possible. Put objects over them because they float. After 20 minutes take them out and hang dry them. (They will drop so do it over a tub) Then when they are moist and not wet wear them until they dry.
Basil, try this as well I think it's your best bet and a great way to start with raw denim.
Buy a pair of 501 shrink to fits. Size up one in the waist to what you usually wear. Then put them in a tub with the hottest water possible. Put objects over them because they float. After 20 minutes take them out and hang dry them. (They will drop so do it over a tub) Then when they are moist and not wet wear them until they dry.
Basil, try this as well I think it's your best bet and a great way to start with raw denim.