Winchester, Mossberg, Remington
The answer would requires a few hours of research.
WMR stands for "Winchester Magnum Rimfire," referring to the .22 WMR cartridge, which is a rimfire cartridge designed for rifles and pistols. It is more powerful than the standard .22 Long Rifle, featuring a larger case and a heavier bullet, making it suitable for small game hunting and varmint control. The .22 WMR is known for its increased velocity and range compared to the .22 LR.
Only if that is what is marked on the barrel. 22 LR and 22 WMR are not interchangeable.
win. mag. rimfire
Yes
As in .22 WMR? That is the full name of the cartridge- the .22 Winchester Magnum Rimfire- usually called the .22 magnum
The Winchester Magnum Rimfire is a larger round, and is capable of producing twice as much energy as the .22lr. I do believe that Ruger is making a rifle capable of handling the .22WMR, but a standard .22lr rifle is incapable of safely firing the .22WMR.
There is a .22 WRF, and a .22 WMR. WRF is Winchester Rimfire. Bigger than a ,22 Long Rifle, but shorter than a .22 WMR- Winchester Magnum Rimfire. If someone is using the term .22 MRF, it is an inaccurate term.
No
.22 Mag shell only.
Yes
Winchester Magnum Rimfire (WMR)