Don't know if it's made anymore, but it would probably be the .17/44 - a .17 projectile in a necked down .44 Magnum casing.
There are several different .17 caliber catridges- some rimfire, some centerfire.
There are any number of things NOT found in a centerfire rifle cartridge. However, what WILL be found is a centerfire primer, a cartridge case, powder and bullet.
what do you mean smallest ? smallest diameter bullet ? smallest case ? 5mm , or 22 high power, 17 rem , be specific .
The .45 caliber bullet is not used in a sniper rifle.
There are 22 caliber centerfire cartridges such as the .22 Hornet and others, but ordinary 22 cartridges (short, long, long rifle) are rimfire.
If you mean a .222 caliber rifle, this is a centerfire bottlenecked catridge. It fires a very small, very fast bullet, and is typically used for target and varmint shooting. It has no relation to the typical .22 rimfire, and is much more powerful.
A rifle that shoots a .22 caliber bullet.
The correct size of the bullet that fits the rifle.
If you're talking about the difference between a .22 short or long rifle and a .25 ACP, the .22 is a rimfire cartridge and the .25 is a centerfire. Also, the .25 is .03 of an inch larger in diamter.
It looks like if it is a centerfire caliber you can use it. So, yes you can use a .223 caliber rifle.
Varies every couple of years. 30/06 probably
That would depend on the caliber, and type of bullet, the rifle uses.