ORIGINAL: younggun243
I don't think you could shoot "2 3/4 if your gun was "3 1/2 chamber, but, like you said, yours is a "3.
If your gun is labeled 3", you can shoot any ammo up to and including 3" shells. If your gun is labeled 3 1/2", you can shoot any ammo up to and including 3 1/2" shells.