What is marked on the shotgun? Unless it is marked for 3 inch shells, DO NOT attempt to fire them. 3 inch shells WILL chamber in most 2 3/4 chambers, but they are UNSAFE to fire- there must be room for the folded end of the shell to open. Using longer shells causes the shell to open inside of the bore, resulting in much higher and unsafe pressures. The 3 inch magnum shotguns began production in the late 1950s- I believe yours is a much earlier model. You should check with Browning- see link below. Shoot safe.
Only if it is chambered for them. Have it examined by a good gunsmith
Some do, some don't. If the barrel is not marked 3"shells, then no.
yes.
if the shell is 410 but 2 1/2 inches long no problem if you a 3 inch chamber size
If the barrel says"2 3/4 inch shells", don't shoot 3 inch magnums. You might get away with it for several hundred shells, or you may crack the stock or forearm with the next shell you fire. If you want a magnum, go buy one, and save the Auto 5 for pheasants quail, and rabbits.
Yes they did. I have one. It is a jap made light 12 but they did make one. It is a quail killer. Perfect for the woods and a joy to shoot.
yes it will. the rating shotguns are chambered for is the maximum size shell you can shoot. i have a 1100 LT chambered for 3 inch and i shoot 2 3/4 inch shells out of it mostly.
Yes you can you can shoot 3 or 2 and a half in
Yes if the A 5 is a Magnum. Magnum versions are able to fire 3 inch cartridges. Browning makes shotguns in both 2 3/4 inch, and 3 inch chamberings, or did the last time I looked at a catalog. Clearly, using 3 inch shells in a gun chambered for the 2 3/4 inch shells is not a good idea. If you must use the 3 inch magnums, get an A5 chambered and built for them. Fabrique Nationale first started making the 12 gauge 3" Magnum A5s in 1958 and stopped in 1976. The 20ga mag was not introduced in the US until 1967. After Feburary 1976 A5 Magnums were made by Browning/Miroku in Japan. This production ended in 1998.
No
Yes
You divide by 2.54 then round