Not sure what an HW3 is, but if it is a firearm chambered for .22 Long Rifle, no, it cannot be "rechambered" to .22 Magnum. The .22 magnum fires a larger diameter bullet than the LR, and has higher pressures. The two cartridges do not interchange except in a few revolvers that have 2 cylinders- one LR, one magnum.
N0- highly dangerous. The bore is also a different diameter.
No. Dimension-wise, they are similar, but there are differences in neck angles and case thickness. .223 Remington ammo can be fired in a 5.56 chamber, but 5.56 ammo should never be fired through a .223 Remington chamber.
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.
No. .22 Magnum may only be fired in a gun Marked .22 Magnum or .22 WMRF. Different length and diameter- as well as power.
No. .270 Winchester and .270 Winchester Short Magnum are not interchangeable cartridges.
.38 Special, .38 Long Colt, .38 Short Colt. .38 S&W CANNOT be used in a .38 Special. .38 Special can be fired from a .357 Magnum weapon, but .357 Magnum cannot be fired from a .38 Special weapon.
Yes, but the opposite may NOT be true. 5.56 x 45 should NOT be fired in a weapon chambered for .223.
No. The WRF (Winchester Rim Fire) is a larger diameter cartridge. It is the same diameter are the 22 WMR (Winchester Magnum Rimfire) but is shorter than the magnum, It may be safety fired in a .22 magnum rifle, but not in a 22 LR. 22 LR ammo should NOT be fired in a rifle chambered for 22 WRF.
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.
No. A .357 Magnum revolver (not an automatic, lever action, or anything else with a headspaced chamber) can fire .38 S&W Special ammo, but not .38 Long Colt.
Yes. The 44 magnum can fire 44 special ammo in the same way a .357 magnum can use .38 Special.
The .357 Magnum cartridge is longer and much more powerful than the .38 Special. While .38 Special ammo CAN be safely fired in a .357 Magnum, the reverse is not true. It is dangerous to try this.