No. The .22 is smaller in diameter than the .25 and would be too small for the chamber of a .25. Generally speaking, you should never try to fire any cartridge in any handgun other than what it is designed to fire. While it may be possible to get a cartridge to fire from a different gun, it may cause damage to the gun or the shooter. Additionally, I forgot to mention that the .22 is a rimfire cartridge and the .25 is a center fire, the the firing mechanism is slightly different in the two guns.
.22 Long Rifle bullets...
No
No it can only fire 22 caliber pellets not bullets.
No. .22mag. bullets are too long, and they aren't heel-type bullets
Probabably 22LR. Have it checked by a gunsmith.
NO NO NO! Only shoot what the rifle is chambered for and so marked.
Yes
Whatever is available ought to be OK. (40grains.....)
22 Long Rifle
Lakeside Razorback belt-fed .22 long rifle pistol, 200 round capacity belts.
No! The .22 magnum is different dimensionally. Do not attempt to chamber a .22 Magnum in a rifle or handgun designated for .22 s,l or lr. In most cases the barrel of a rifle or handgun will indicate the chambering!
A .22 revolver takes CARTRIDGES. Which .22 cartridge will depend on what caliber the revolver was made for. A .22 LR can shoot Long Rifle or Short cartridges, and a .22 WMR uses .22 magnum cartridges. They do not interchange. There are a few .22 revolvers that have 2 cylinders, and can shoot either cartridge.