Grist Andrew, Lines Jeff A, Bock Randall, Knowles Toby G, Wotton Stephen B
School of Veterinary Sciences, University of Bristol, Langford House, Langford, North Somerset BS40 5DU, UK.
Silsoe Livestock Systems, Wrest Park, Silsoe, Bedford MK45 4HR, UK.
Animals (Basel). 2019 Aug 14;9(8):552. doi: 10.3390/ani9080552.
Blank cartridges provide the power source for the majority of captive bolt devices used for rendering animals unconscious prior to slaughter within the United Kingdom or euthanasia worldwide. This paper presents the results of the examination of cartridges as one of the variables that can contribute to an unsuccessful application of this method in practice. Variation was found in cartridge weight, propellant fill volume and velocity within boxes of 1000 cartridges. The variation found was greater in lower charge (1.00 grain) cartridges than in 3.00 grain cartridges, however velocity was found to be variable in both sets. For example, in vivo velocity measurements with 0.25″ calibre 3.00 grain cartridges demonstrated an average velocity of 50.8 m/s over 200 shots with a range of 35.7 to 62.9 m/s when used in the same device. This work demonstrates that variation in cartridge performance does occur and can be due to various factors such as fill volume and propellant function, and simply weighing cartridges cannot be used to determine function, therefore cartridge performance must be a factor that is considered in the event of a miss-stun.
空包弹为英国境内屠宰前使动物昏迷或全球范围内实施安乐死所使用的大多数栓式枪击设备提供动力源。本文介绍了对空包弹进行检验的结果,空包弹是可能导致该方法在实际应用中失败的变量之一。在每盒1000发的空包弹中,发现其重量、推进剂填充量和速度存在差异。所发现的差异在低装药量(1.00格令)的空包弹中比在3.00格令的空包弹中更大,不过两组空包弹的速度均存在变化。例如,使用0.25英寸口径、3.00格令的空包弹进行体内速度测量时,在同一设备中发射200发,平均速度为50.8米/秒,范围在35.7至62.9米/秒之间。这项工作表明,空包弹性能确实会出现差异,可能是由于填充量和推进剂功能等各种因素导致的,仅仅称量空包弹无法确定其功能,因此在击晕失败的情况下,空包弹性能必须作为一个考虑因素。