we have butchered two sheep last saturday, using a real gun is not legal here. another reason beside its not legal is the fact you have bullets sometimes coming out on the side in an unforeseeable direction and hit bystander.they had some serious accidents in the slaugtherhouse when using revolver.
german ingenuity invented the Kerner/Blitz captive bolt pistol that is not a gun under local gun law.this thing is more or less the same for over 100 years now.

its very simple and reliable, I have cleaned one in the neighborhood the first time after 50 years

the blank cartridge is another version of the very old 380short CF, for americans better known as 38 short colt

never notice before the bolt have a similar holow point like the 32 greener catle killer above