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Only if that is what is marked on the barrel. 22 LR and 22 WMR are not interchangeable.
No published sn data.
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
As in .22 WMR? That is the full name of the cartridge- the .22 Winchester Magnum Rimfire- usually called the .22 magnum
No. The case of a 22 WMR is longer than that of a 22 lr, so the cartridge won't fit in a rifle that is chambered for 22 lr.
Yes
No.
No
I think you mean 22 WMR ammo. If you buy ammo just ask for the 22 WMR which is different then other 22 ammo
WMR stands for Winchester Magnum Rimfire- and is the proper name for the 22 Magnum. They are the same cartridge. The 22 WRF is the Winchester rimfire, and is a shorter, less powerful version of the 22 magnum.
.22 Mag shell only.