en:faq:faq-casevolume

Why measure FIRED case volume?

The need for case volume measured from a case fired from your own gun corresponds to the combustion space that effectively prevails while the powder is being burned.

The pressure required for expanding the case in the chamber takes only a fraction of the maximum combustion pressure. Roughly about 1/10, that is in the range of 350 bar (about 5000 psi) for rifle cartridges and about half for pistol cartridges. Of course, this varies by the manufacturer and design of the cartridge.

Finally, this leads to the fact that the major part of the combustion process takes place at fired case volume. As is well known, a firearm is nothing more than a combustion engine with a certain starting “displacement”. The simulation simulates this process, and therefore, requires the most realistic volume possible.

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  • en/faq/faq-casevolume.txt
  • Last modified: 2021/05/30 03:34
  • (external edit)