No.
If you mean .17 HMR and .22 LR, yes.
With enough money, yes.
There have been several different .17 caliber rifles- rimfire and centerfire. Right now, I am guessing that you mean the two most common .17 rimfires- the ,17 Mach 2, and the .17 HMR. The Mach 2 is basically a .22 Long rifle necked down to .17. The 17 HMR (Hornady Magnum Rimfire) is a .22 Magnum necked down to .17. It has more energy than the .17M2. They two cartridges DO NOT interchange. Ammo is more common for the .17 HMR. No experience with the M2, but the HMR is incredibly accurate at 100 yards.
hornady magnum rimfire
Ruger makes the New Model Single Six in .17 HMR, Taurus makes the 17SS6 in .17 HMR, the S&W 647 is available in .17 HMR, the Taurus Tracker can be had in .17 HMR, Alexander Arms and Excel Arms both make semi auto .17 HMR pistols,
Depends on target, distance and pocketbook.
Yes it will.
If you can find a custom maker, maybe, otherwise, no
The semi-auto .17 HMR has been recalled. 17 HMR ammo has been found to be incompatible with semi-auto firearms. See the link below for the recall.
I believe the smallest bullet in terms of diameter is the .17 HMR. It is a .22 casing that is necked down to accept a .17 caliber bullet.
The .17 Hornady Magnum Rimfire (HMR) IS the name of the cartridge. It is a bottle necked rimfire cartridge- similiar to a a .22 Magnum necked down to .17 caliber bullet. Bullets used in this cartridge may be several different types, but are typically 20 grains or 17 grains in weight.