No, due to the damage steel does to the barrels. Not recommended by Browning
Depends on when it was made.
Depends on when it was made. Go to Browning.com and ask.
If it was made to shoot steel shot and has interchangeable chokes.
As long as the barrel was made after 1950 and does NOT have a full choke, you will be able to shoot steel #2 or smaller.
The "RN" indicates it was made in 1979
Depends on weather the receiver is made of aluminum or steel.
1979
Yes certainly it can with barrels intended for steel. It is generally not reccomended to shoot steel through Belgian FN guns no matter the choke. If you have a Japanese made gun with the invector choke system it is likely ok, but not certain. Check the year and be certain that the (invector) choke is rated for steel. The best reccomendation is to consult Browning with the year your gun was made (by serial number) and the barrel markings to identify the time period the barrel was made. They are best suited to recommend a safe answer to this question. Auto5man
The steel is stronger, but that doesnt nescesarilly mean its better
It stands for 'Nickel Steel', the material the metal is made from.
You will have to call Browning to find out.