Yes I can understand the quick kill however you may not have come across the volume of wild boar that can swamp your dogs and yourself
I was recently chatting with a ranger in an area close to the Macquarie marshes who said that they had a chopper and a weld mesh fence trap of about 100 meters in diameter and the got aprox four and a half thousand pigs in two days
There is a German company that places 40 foot refrigerated containers in the country towns for the farmers (called Chillers)
They shoot pigs and hang them in the Chillers and the farmers make a few extra bucks