Why doesn't anyone make a levergun in 454 casull?  I think this would be very cool.  I am guessing the gun could be light and compact, and I am sure it would be quite powerful.  If chamber pressure is such a problem, then why can a 6 shot revolver handle it?  Just wondering.

Never uderestimate the durability of a well-crafted revolver. I've been lead to the understanding that in several ways it is easier to build an ultra-tough five or six-shooter than a comparably strong rifle. I still don't "get" all the engineering mumbo jumbo but it's there.

The 454 Casull operates at a SAAMI spec of 65,000 psi, greater than many high velocity, bottleneck rifle cartridges. Making a durable lever action for the round would be an expensive engineering problem with limited return for the manufacturer. It could be done but how many would buy one?

Jake,

When its all said and done, a rifle strong enough to handle the pressure of the 454 would be large enough to be chambered in 45-70. Of course between the two the 45-70 is much more versatile. I'm first to admit a weakness for rifles chambered in a pistol cartridge but the 454 rifle just wouldn't be practical.

Browning's most powerful cartridge for the low-wall is the .260 Rem, while the .454 Casull is on the stronger hi-wall action.  

Kinda seems backwards, with pistol cartridges in a "rifle action" and rifle cartridges in a "pistol-cartridge action."  But, at 65k psi, I guess it needs the metal.
 
- Charlie