Merl67

19155 may be a replaced barrel. with an earlier one. Or, its possible that the factory found an earlier barrel lying around, and used it . I also recognize that we have a very small sample, and with a lot more guns, we might find anomalies, although I doubt that there are a whole lot more survivors.

KarlJ

Thanks for the information on 15031. I added it to the file.

Regards, Mike