No. They will be too large to fit in the gun or be fired out of the barrel.
Varies according to the caliber.
The word "caliber" refers to the diameter of the internal bore of a gun or firearm barrel.
gun shop, gun show
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.
It should be marked on the barrel.
No. Shoot only the caliber printed on the barrel.
Blue Book of Gun Values, old gun catalogs
If it is not stamped on the barrel or you do not trust the barrel markings, the only reliable way is to have a gunsmith make a casting of the chamber.
Depends on the caliber, type of barrel, whether it is on a handgun or rifle, etc..
The caliber of a Philadelphia derringer with Jukar 054167 Jukar stamped on the barrel is not known. There isn't enough information to determine what the caliber would be. A gun collector would be a good person to ask.
No. The Luger was a 9mm gun and the 50 Desert Eage is a 50 caliber gun. The 9mm round would fall out of the barrel, and if you did manager to get it to fire, you could damage the gun and/or hurt yourself.