The 22 Long Rifle has different size cartridges, But the 22 Hornet has pictures of deer killed with it. The 22 Hornet is a lot more powerful than the 22 Long Rifle. They both have different grain.
No. They are totally different size and shape cartridges. 22LR si rimfire, 22 Hornet is a centerfire.
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.
Yes
$200
It is a bit of overkill.
The answer is probably stamped on the barrel. Does it say .22 Hornet? Most likely it says .22 LR or .22 Long Rifle. Two other things: The Hornet is a center-fire cartidge, "regular" .22's, be they shorts, longs or long rifle, are rimfire, having the priming mixture in the rim of the cartridge case. Look at the firing pin and see where it is located compared to the case head. On the edge?(rimfire) or centered?(Hornet) The chamber for the .22 Hornet is larger in diameter than the .22 rimfire, as the Hornet is a bottle-necked case. A .22 rimfire case will fall down inside the chamber of a Hornet and be loose. IF YOU PUT A RIMFIRE CARTRIDGE IN AND IT FALLS DOWN IN THE CHAMBER BE SURE IT IS OUT BEFORE YOU PUT ANOTHER CARTRIDGE IN OR YOU WILL HAVE AN EXPLOSION AND PERSONAL INJURY!!! My apologies. I believe the 22 Hornet is a straight or tapered case. I was confusing it with the 25:20, which is bottle-necked. The 22 Hornet is a "bottle neck" case, the rimfire has a straight case and will fill the chamber of the Hornet.
Mauser for one.
50-200 USD or so
There are 22 caliber centerfire cartridges such as the .22 Hornet and others, but ordinary 22 cartridges (short, long, long rifle) are rimfire.
Contact the maker.
50-150 USD or so