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Talk:.50 BMG

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Parent Case

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Stop conflating parent case and parent design. Derived does not equal "parent case." 30-06 is not a "parent case" to 50 BMG by definition, but a "parent design," scaled up at the engineering drawing level to work with 670 grain 51 caliber bullets. To be a "parent case" the design would have been necked up or down, shortened, etc. for different caliber bullets and to optimize for shorter actions, etc.

  • A parent case is exactly what it sounds like; it is the original & unique case from which new cartridges are built. For example the .30-06 Springfield is one of the earliest mass-produced big game cartridges. The .30-06 Springfield is also the parent case for many popular hunting cartridges. A small sampling of these include the: .25-06 Remington, .270 Winchester, .280 Remington, .338-06, and .35 Whelen.
  • A given cartridge has a perceived range of capabilities (or perceived power potential). New cartridges can be built from the existing cartridge to accomplish a new set of capabilities. This is done by simply changing one or more of the case’s three main physical characteristics. These are: 1-the neck diameter, 2-the case length, and 3-the shoulder height & angle. A fourth could be body taper, but that is much less common than the first three.[1]https://gundigest.com/more/how-to/modifying-parent-cases-to-achieve-desired-power-potential

You can't take a 30-06 case and make it a 50 BMG case. 30-06 isn't its parent case. Winchester and Frankford Arsenal (cited in the article) designed it by scaling dimensions of the 30-06. They didn't use it as a "parent case" because that's literally impossible. Caisson 06 (talk) 18:02, 12 November 2024 (UTC)[reply]