Review by ronb
Review by DG
Review by smartacus
Posted On: 10/21/11 By: Rhenda
The answer to your question is "a combination of extra powder and extra marketing." There is no broad definition for what makes a magnum load. In most cases, "magnums" are existing cases that have been lengthened to become a new, more powerful case (for example, .38 Special becomes .357 Magnum). This is also true for .44 Magnum, which was developed from .44 Special. An oddity is the new .327 Federal Magnum, which was developed from a less powerful magnum, the .32 H&R Magnum, which was itself developed from .32 S&W. However, the reverse is sometimes the case. The .500 S&W Magnum was developed as a completely new cartridge, and the .500 S&W Special was developed several years later.
To reiterate, while magnum cartridges have more power (and powder) than their smaller counterparts, there is no set definition for the term.
Posted On: 10/10/11 By: Michael