FN
They were introduced in 1995.
They have been made since 1988.
You can, but, you will cause a barrel bulge after a while.
You will need to supply the serial numbers to your shotguns to get the age of your browning shotguns correctly.
Browning Arms
Contact Browning.
The Browning 12 gauge shotgun with serial number 55852-75G was manufactured in 1975. Browning shotguns typically use a serial number system that helps identify the production year, and the "75" in the serial number indicates the year of manufacture.
The Browning Superposed shotgun with serial number 2203378 was manufactured in 1961. The serial number indicates that it falls within the production range for that year, as Browning produced Superposed shotguns from 1931 until 1988. If you have a specific question about this model or need further information, feel free to ask!
www.browning.com
If you have the money.....
All Browning B-2000 shotguns were Belgium manufacture but assembled in Portugal.