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Factors affecting penetrating captive bolt gun performance.

Troy J Gibson1, Charles W Mason, Jade Y Spence

  • 1a Department of Production and Population Health , Royal Veterinary College , Hatfield , United Kingdom.

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|November 22, 2014
PubMed
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Captive bolt gun (CBG) performance varies, with government-held models generally outperforming commercial ones. Routine checks for wear are recommended for repeated firing to ensure proper stunning of livestock.

Keywords:
animal welfarecaptive boltkinetic energyslaughtervelocity

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Area of Science:

  • Veterinary Science
  • Animal Welfare
  • Mechanical Engineering

Background:

  • Captive bolt stunning is a critical method for rendering livestock insensible before slaughter.
  • Evaluating the mechanical performance of captive bolt guns (CBGs) is essential for humane slaughter practices.

Purpose of the Study:

  • To assess the mechanical factors influencing the performance of six penetrating captive bolt gun models.
  • To compare the performance of CBGs held in government repositories versus those used by commercial contractors.

Main Methods:

  • Kinetic energy measurements were taken for various CBG models.
  • Performance standards were evaluated for government and commercial CBGs.
  • Temperature changes and performance degradation were monitored during repeated firing tests.

Main Results:

  • The Matador Super Sécurit 3000 and .25 Cash Euro Stunner exhibited the highest kinetic energy.
  • A significant portion of commercial contractor CBGs underperformed compared to their designated model standards.
  • Extended firing sessions led to overheating and reduced CBG performance, with one model reaching 88.8°C after 500 shots.

Conclusions:

  • Kinetic energy, bolt penetration depth, and animal specifics are crucial for selecting appropriate CBG/cartridge combinations.
  • Routine inspection of CBG bolts and barrels is recommended, especially after repeated use in a single session, to maintain performance standards.