I read it and understand the concept. It is a terrible concept. If you can make a head shot on a charging leopard then why do it with birdshot then follow up with something that will actually kill it?You obviously have not read and understood the concept. It clearly states that it is meant to blind the animal and get dispatched with a rifle or slug. If the animal can't see, it can't attack you. Tell some Guides in Alaska that hunt Grizzly Bears that it's a bad idea because some of them use this tactic.
Why not just shoot a round that will kill it in the first place. And even it it's blinded the first thing that cat gets ahold of is going to get shredded.
And while I've never hunted leopard I have been a cop for almost 20 years and I've pointed shotguns at a lot of people. And oddly enough we don't use birdshot to blind the armed felon so we can then shoot him with a rifle or something. We use slugs or buckshot because those are made to stop dangerous people/animals.
And if I did meet a grizzly guide who used birdshot to blind a charging bear I would tell him that's a terrible idea then pack my shit and leave because there's no way I'd hunt with that bozo.