ⓘ Belted magnum. The term belted magnum or belted case refers to any cartridge, but generally a rifle cartridge, with a shell casing that has a pronounced belt ar ..

                                     

ⓘ Belted magnum

The term belted magnum or belted case refers to any cartridge, but generally a rifle cartridge, with a shell casing that has a pronounced "belt" around its base that continues 2–4 mm past the extractor groove.

This design originated with the British gunmaker Holland & Holland for the purpose of headspacing certain more powerful cartridges. Non-shouldered non-"bottlenecked" magnum rifle cartridges especially could be pushed too far into the chamber and thus cause catastrophic failure of the gun when fired with excessive headspace. The addition of the belt to the casing prevented over-insertion. An example of an American adaption of this practice is seen in cartridges like the.458 Winchester Magnum, also a shoulderless heavy magnum.

Many subsequent cartridges of "magnum" nomenclature were based on the original.375 H&H cartridge, so over time the belt became something of a standardized attribute, expected as part of a "magnum" cartridge. Many cartridge designs of the last century include this belt, but do not really require it.

In the last decade or so, there has been a trend toward beltless magnums, virtually all of which are heavily shouldered designs that obviate the original motivation for a belt.

                                     
  • member of the belted magnum family that is directly derived from the venerable 375 H H Magnum The original purpose of the belted magnum concept taken
  • significantly more capacity than any conventional belted magnum Compared to the 7mm Remington Magnum top 7mm RUM loads deliver 25 more energy at 300
  • prolong case life of the cartridge. As modern belted magnums such as 7mm Remington Magnum and 300 Winchester Magnum actually headspace on the shoulder despite
  • Remington Arms. All of the RUM cartridges are based on the 404 Jeffery non - belted magnum cartridge. There is a long - case line, as well as a shortened version
  • The 378 Weatherby Magnum was designed by Roy Weatherby in 1953. It was an original belted magnum design with no parent case, inspired by the 416 Rigby
  • The 264 Winchester Magnum is a belted bottlenecked rifle cartridge. Except for the 244 H H Magnum and 257 Weatherby Magnum it is the smallest caliber
  • belted magnum cases based on the 300 H H Magnum and 375 H H Magnum This allows the cartridge to have a greater case capacity than a belted magnum case
  • belted magnum cases based on the 300 H H Magnum and 375 H H Magnum This allows the cartridge to have a greater case capacity than a belted magnum case
  • used an improved belted case shared with the 275 H H Magnum when they were introduced together in August, 1912. This second belted case design was later
  • The 270 Weatherby Magnum was the first belted magnum based on the 300 H H Magnum to be developed by Roy Weatherby in 1943. The cartridge is short enough
  • States. All of the WSM cartridges are inspired on the 404 Jeffery non - belted magnum cartridge which is shortened to fit a short rifle action such as a
  • Holland Holland in 2003 together with the 400 H H Magnum The 465 H H Magnum is a 468 caliber, belted rimless bottlenecked cartridge. The cartridge is