Hi all. I just got a sistema 45. From the serial number looks like the date of manufacture is 1952. Now, given the overall condition I think I got a decent deal at $400, but the barrel looks pretty worn. There still is some rifling probably 2/3 of the way down the barrel. My question is should I be looking at getting a new barrel, and if so how big of a project is that. Keep in mind this is a shooter, not for competition and obviously not a show piece. Thanks