I will probably piss off a couple of users of buchshot, but anyway.

Buckshot are a pore way of getting large animals shooting an unsighted shotgun, if sighted a slug would be much better. Surely a buckshot will kill any animal if hitt right, but how many animals hasnt walked off with only one or two pellets under the skin and tought of as a miss. I cant understand the use of the buckshot at all, if you can hit and kill with a buckshot you will also be able to hit it with a slug or an ordinary rifle, and it will get past a bone if one is struck. The only use of a buckshot to me would be shooting of a speeding flatbed and trying to get a pig thats already is wounded.

As stated the 00 is about a 0,33cal roundball, and if i remember right theres about nine of them.
I wonder how many people would want to use a 0,33cal ducksfoot or pepperbox as a backup for cats?
Take a look at old mussleloaders, how many 0,33cal mussleloaders was concidered as a large game rifle or even less a big cat rifle? And to understand the animal in question, take an ordinary domestic cat upp in one hand, grab it under the belly and shake it and the add about 15-20 time the strenght. If its one thing i would fear it would be an angry cat, i would for sure not to try throwing an handfull of pellets at it when charged, i would want the biggest gun i could handle with accuracy and shooting a fast expanding bullet thru it. Are there any 8-bore varmint bullets out there?