Mac,

What they are worried about is putting out a quantity of .411 ammo in the chambering. Then some dipshit shoots the .411 ammo in his old .408 bore (which he didn't slug) and blows his ass off. Then the lawyer shopping. . .

It's not the rifle, but the ammo. Think about why the U.S. ammo makers only loaded the 8x57 to puny ballistics. They wanted to make a load that could safely extrude a .323 bullet into a .318 bore - possibly an '88 Commission Rifle.

Now you understand. Can't revive a classic chamber if the ammo won't fly in today's liability market. Sad but true.

Best to you, and I hope your medical condition is ok.

Curl