Yes, however, they may not cycle thru, and need to be loaded one at a time. Chamber will need cleaning after shooting the shorter magnum cartridge.
No, they are different sizes.
No, it will not.
If you mean a Remington 512 X Sportsmaster, no. It is for .22 Short, Long, Long rifle cartridges. The .22 magnum is longer, larger in diameter and more powerful.
The Light will only accept and shoot 2 3/4" shells. The Magnum will shoot up to 3" 20ga shells.
Your rifle should be chambered for .22 Magnum. As such, the chamber is too long and too big for .22 Long Rifle and, if the shell will fire, the case will usually split. Not recommended.
If has the magnum cylinder it will.
The sizes of shells it accepts will be stamped on the barrel
No. .22 Magnum and .22 Long Rifle are not interchangeable.
In a .44 Magnum revolver, yes. In a semi-automatic .44 Magnum (such as the Desert Eagle), no.
In general, no. Unless the gun is marked for 3 inch (or even 3 1/2 inch) shells, you should not attempt to fire 3 inch Magnum shells, even if they seem to fit. However, if you have a gun made for 2 3/4 inch shells, and have 2 3/4 inch "magnum" shells, IF your gun is safe to shoot, it should be safe to shoot those "baby" magnums.
Yes it will as well as 22 short and long rifle, but the rifle will only shoot the 22 LR shells as a Semi auto and the shorts and longs you will have to manually cycle the gun by hand
NO!!