The mini-mag should still be .22 LR.
No. It is a 22LR semiauto, and needs 22 LR ammo to cycle the action.
NO. .22 Magnum has a larger diameter case than .22 LR. The LR case will split.
These were made for Gamble's Stores by Savage, and are caliber .22 LR.
No
No. The .22 LR is a straight sided RIMFIRE cartridge. The Hornet is a bottlenecked CENTERFIRE cartridge. The chamber of a Hornet is MUCH bigger- you could not get a Hornet into a .22 LR chamber- and the firing pin would hit in the wrong place.
There are revolvers made with 2 cylinders that can switch back and forth between LR and Magnum ammo. However, those have a barrel bored to magnum specs. Simply adding a magnum cylinder to a 22 LR is not safe.
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.
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.
In general, no. The .22 LR is a straight sided rimfire cartridge 1 inch long. The .223 is a bottlenecked centerfire cartridge almost 3 inches long. Totally different. The 22 LR CAN be shot in a .223 by the use of a special adapter.
22 Long Rifle
No. The .22 Long Rifle is not compatible with the .22 Long cartridge. Most .22 Long Rifle revolvers, lever and pump action rifles fed from a tubular magazine, and single shot rifles can accept .22 Long and .22 Short cartridges, but the .22 LR round is too long for a dedicated .22 Long chamber.
It might or might not.