Yes. The 44 magnum can fire 44 special ammo in the same way a .357 magnum can use .38 Special.
It can use either 44 magnum or 44 special
You may use any brand of 7mm Magnum rifle ammo.
If your Iver Johnson is marked for the .22 WMR.then yes,if it is not then do not attempt to load or shoot .22magnum ammo in your rifle.
No. Use only what is printed on the barrel.
Yes, you can shoot 38 specials through a .357 magnum revolver.
No. 357 SIG and 357 Magnum are two very different cartridges. You can use .38 Special in a .357 magnum gun, but not 357 SIG Adding to the above, the compatibility of .38 Special and .357 Magnum applies only to revolvers. You cannot cycle .38 Special in a magazine fed .357 Magnum lever action or semi automatic.
.22 WRF or .22 Remington Special
As long as both the rifle and the revolver are chambered in .44 magnum you can use the same ammunition for both. I have a Henry rifle in .44 mag and a Ruger redhawk .44 mag and I use the same ammo for both. That's one of the nice things about that caliber.
A .357 Magnum revolver can, as it uses cylinders and does not require headspacing between a cartridge and a chamber. Semi automatic, lever action, etc. .357 Magnum firearms which use a headspaced chamber cannot, however.
Your question is a bit ambiguous, so I'll go with the notion you're referring to the longest confirmed kill by a sniper. That was achieved with a rifle chambered in .338 Lapua Magnum.
No. However, .38 Special ammo CAN be safely fired in a .357 Magnum firearm. Both cartridges use a bullet that is .357 in diameter- but the .357 magnum is longer, and more powerful.
The model 28 was made to fire the .357 magnum cartridge, but you can also fire the .38 special cartridge. The .38 special is lighter in recoil and easier on the pocket book than the powerful .357 magnum. Use .38 Special for practice, and .357 for a hunting or defense load.