The only place that had them in stock was Peacemaker Specialties, Eddie Janis. I did two guns at the same time (the NF pictured above and one SAA) and used a .357 for this one and a 38/40 for the other, both were used for .45 chambered cylinders, looking back, I should have used either 38/40 or 44/40 for both guns as they were cheaper than the .357 cyl and accomplish the exact same thing.....live and learn.