'The 200' (lol)
Perhaps it comes as no surprise, but I happen to still have full boxes of 200-grain .38 Special ammunition in both major brands.
If one favors blunt hoses on heavyweight bullets, then I suppose the Western is the winner in this (obsolete) category. I shot quite a few boxes of that stuff out of a Model 60 some years back, and it was great fun: In bright sunlight, you could almost see the bullet sort of whirring its way downrange.
I also have this box of Vintage Oddities.
I'm not sure what those Gecos were up to when they cooked up this one.
I think about the only 'armor' it might defeat would be that of an Armordiller, and he might just get mad about it.
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