Same thing it means on all .22LR ammo - it's indicating that it's .22 Long Rifle (as opposed to .22 Short, .22 Long, .22 Magnum, etc).
No. It is a 22LR semiauto, and needs 22 LR ammo to cycle the action.
Yes, will work fine!
.22 mag and .22 LR are not the same. So, no.
LR stands for Long Rifle which means the pistol uses a .22LR caliber bullet
It's possible, but the likelihood of error is pretty high when using .22 shotshells for that purpose. Better just to use regular .22 LR rounds, or regular shotshells.
The answer is maybe. Certain revolvers are "convertibles"- they have two different cylinders. However, for most firearms, 22 LR should NOT be shot in .22 Magnum guns (cartridge case will split) 22 Magnum ammo will not fit in a 22 LR chamber- too fat to fit.
22 LR
I assume you are speaking of a Ruger 10/22 semiautomatic rotary clip carbine. For small game and plinking any quality 22 long fire will do. CCI stingers are best for rabbit while regular Federal 22 LR will do for most plinking
22LR is a industry standard, the other isn't
Yes
The mini-mag should still be .22 LR.
22 Long Rifle