Depends on what is marked on the gun.
Deer slugs are the shotgun shells to use when deer hunting.
That is the rear end of the barrel where the shell is inserted.
It will be marked on the barrel.
Should be marked on the barrel
Generally, no. While single shot rifles MAY have the rifle barrel replaced with a shotgun barrel, reverse is not true (usually) A rifle cartridge generates much higher pressures than a shotgun shell.
Sorry- that is a serial number, and conveys no information. If the barrel is not marked, you need to take it to a gunsmith who will measure the chamber- not only for gauge, but for the correct shell length. Just because an unfired shell fits does not mean it is the correct shell. And it is not a rifle, but a shotgun.
a slug is normally use in a shot gun and they are not rifled a gun with a rifled barrel should shoot a Shell that is the same caliber as the gun.
England, impossible to give value without name of maker.
Close the shotgun action and insert a rod down the barrel to the standing breech (to the rear edge of the chamber or where the back of the shotgun shell would be). Mark the end of the rod protruding from the barrel. Remove the rod and measure its length. Per federal law (GCA 1934), this must be a minimum of 18"
The danger is that the shell will fall forward, blocking the barrel, but allowing a 12 gauge shell to be loaded. If that is fired while the barrel is locked, the gun will likely blow up, destroying gun and injuring the shooter and innocent bystanders.
Yes as long as you get one made for the Winchester model 1300 and chambered for the same length of shotgun shell that the receiver is chambered for.
Should use either 2 1/2" or 3" .410 shotgun shells.