Is 22 WRF the Same as 22 Magnum?

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.22 WRF (Winchester Rimfire) and .22 Magnum (also known as .22 WMR, Winchester Magnum Rimfire) are not the same, though they are somewhat related. They differ in terms of their dimensions, power, and intended use.

Key Differences:

  1. Cartridge Dimensions:
    • .22 WRF: The .22 Winchester Rimfire is an older cartridge, introduced in 1890 by Winchester. It has a shorter case length (approximately 0.965 inches) compared to the .22 Magnum. The bullet diameter is the same as .22 LR (long rifle), around 0.224 inches.
    • .22 Magnum: The .22 Winchester Magnum Rimfire, introduced in 1959, has a longer case length (approximately 1.055 inches) and can accommodate more powder, giving it greater velocity and energy than the .22 WRF. The bullet diameter is also around 0.224 inches.
  2. Power and Performance:
    • .22 WRF: This cartridge was originally designed for small game hunting and target shooting. It is less powerful than the .22 Magnum, with lower velocity and energy.
    • .22 Magnum: The .22 WMR is more powerful and capable of higher velocities, making it suitable for hunting larger small game and for self-defense. It delivers more energy on impact compared to the .22 WRF.
  3. Compatibility:
    • Firing .22 WRF in a .22 Magnum Gun: .22 WRF cartridges can be safely fired in most firearms chambered for .22 Magnum. The shorter .22 WRF round will fit in the chamber of a .22 Magnum firearm and function properly, though it will have less power.
    • Firing .22 Magnum in a .22 WRF Gun: .22 Magnum cartridges should not be fired in firearms specifically chambered for .22 WRF. The .22 Magnum has a longer case and generates higher pressures, which could be dangerous if used in a gun designed for the lower-powered .22 WRF.
  4. Usage:
    • .22 WRF: Today, the .22 WRF is less common and is mostly used by enthusiasts with older firearms. It is mainly found in older lever-action rifles and some early revolvers.
    • .22 Magnum: The .22 WMR is more widely available and is popular for hunting, target shooting, and even self-defense in some compact firearms.

Conclusion:

While the .22 WRF and .22 Magnum share some similarities, such as bullet diameter, they are different cartridges with distinct characteristics. The .22 Magnum is more powerful, with a longer case and higher velocity, and is not interchangeable with the .22 WRF in firearms chambered exclusively for the latter. However, the reverse is true: .22 WRF can typically be safely fired in a .22 Magnum firearm. Always consult your firearm’s manual or a qualified gunsmith to ensure safe and appropriate ammunition use.

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