That doesn't mean the Badger won't handle those pressures. Check with the manufacturers about the strength of the action.
From the few I've seen, they look pretty tough.
The real problem, as I see it, 'not tongue in cheek', is that you need to KNOW, with certainty, the alloys, and thereby the strengths of the various pressure holding components, which I kinda doubt Chiappa is gonna just hand over. Just my opinion, but I kinda doubt Chiasppa is putting expensive material in a gun designed to be safe at Rimfire pressures. Maybe I'm wrong, but if it was my face, I'd err to the side of informed caution.
Then, you need to do some pretty fancy math, to see if you have even a Chance, of containing far higher pressures than the gun was designed to deal with. I have looked at, without firmly understanding, the math that goes into this, Pressure and hoop stress calculations, although I am fairly sure some keener has built an online app to calculate it. If you can trust that. And, you need to be CERTAIN, on the contact between the barrel, and the block that it fits in, on the action. A very small amount of gap between a too thin Barrel Wall/Chamber Wall, unsupported by a tight enough fit into the block, and the numbers go out the window.
If you look in to some of the rimfires that HAVE been converted without much fuss, they are either grossly over engineered, like the small frame Martinis, or they were actually designed to be able to withstand what amounts to ludicrous pressures against possible future line expansion, most notably the 5mm rim fire Remingtons that were essentially designed from the outset to be safe at 60K psi figures. (5XX series, IIRC, bolt guns with rear locking lugs FAR in excess of rimfire needs!). These latter STILL need a threaded barrel conversion, but the basic numbers that have shown up in historical research, seem to indicate that the guys who designed it, REALLY wanted it to be a strong action!
If you build it on the basis that you will only ever run downloaded ammo in it, you are gonna be personally responsible, for when the uninformed dude stuffs a favorite 'hot load' that works well in HIS fave Hornet, into the chamber.
Most of that above, is why I think it is a bad idea.
