Ummmm...yeah, that's about the worst possible choice.
Jeez. Look, you're either going to have to handload something, or run a lesser caliber...correct me if I'm wrong here, but can't the 460 shoot...45LC? Or...something else? I don't know much about that the 460.
One option if you're handloading: people have experimented with lightweight Delrin plastic loads carved down on a lathe or cut from plastic cylindrical bar stock. What you get is about a 100gr full wadcutter doing some unbelievable speeds. I seem to recall somebody crossing 3,000fps in a 454Casull once. Hit somebody with THAT and...oh boy. Somebody get a mop and bucket, stat. It ain't gonna be pretty. But it also won't overpenetrate. ("Hey, is that a piece o' lung on the ceiling?"
)
What you just pointed to...dang, I think it would take MORE than 10 supersized Americans to stop one. Add a brick wall or three for good measure. In any urban area that stuff would be criminally negligent to crank off. Wilderness, fine, but...yikes, not anywhere there's bystanders.
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Look...the ONLY form of "gun control" that makes sense is connected to the question "what's the risk to bystanders?"
We often get asked "well should private citizens own nukes?"
My answer is "not on planet earth, no. But if it's 400 years from now and you've got your own asteroid mining claim and you're in legit fear of space pirates, and your nearest neighbor is about 150,000 miles away, a nuke-based home defense system might make perfect sense."
Is a 50BMG rifle a good home defense gun in suburbia? Hell no. In the middle of the Alaska wilderness? Or on a sailboat 500 miles out to sea? No problemo.
What's reasonable is connected to risk to bystanders. And that particular 460 load is flat nuts in that department.