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Factors affecting penetrating captive bolt gun performance

By T. J. Gibson, C. W. Mason, J. Y. Spence, H. Barker, N. G. Gregory

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Abstract

Captive bolt stunning is used for rendering livestock insensible at slaughter. The mechanical factors relating to performance of 6 penetrating captive bolt gun (CBG) models were examined. The Matador Super Securit 3000 and the .25 Cash Euro Stunner had the highest kinetic energy values (443 J and 412 J, respectively) of the CBGs tested. Ninety percent (27/30) of CBGs held at a government gun repository (United Kingdom) were found to have performed at a normal standard for the model, while 53% (10/19) of commercial contractor CBGs tested were found to underperform for the gun model. When the .22 Cash Special was fired 500 times at 4 shots per min, the gun reached a peak temperature of 88.8°C after 2.05 hr. Repeat firing during extended periods significantly reduced the performance of the CBG. When deciding on the appropriate CBG/cartridge combination, the kinetic energy delivered to the head of the nonhuman animal, bolt penetration depth, and species/animal type must be considered. It is recommended that CBGs are routinely checked for wear to the bolt and barrel if they are repeatedly fired in a session.

Publication Title Journal of Applied Animal Welfare Science
Volume 18
Issue 3
Pages 222-238
ISBN/ISSN 1088-8705
DOI 10.1080/10888705.2014.980579
Language English
Author Address Department of Production and Population Health, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield AL9 7TA, UK.tgibson@rvc.ac.uk
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Tags
  1. Animal welfare
  2. British Isles
  3. Commonwealth of Nations
  4. Developed countries
  5. Europe
  6. Head
  7. Livestock
  8. models
  9. OECD countries
  10. peer-reviewed
  11. penetration
  12. rendering
  13. stunning
  14. temperatures
  15. United Kingdom
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  1. peer-reviewed