Zapata, (shoe), I have one of the Pedersolis that has been rechembered to 458 RCBS, and it is going to be re-chambered to 450#2 NE shortly. The Pedersoli is a very strong hammer rifle, and is well made. NitroX is right this is really the way to go for a double rifle that is right for rifle chamber pressures. The LC Smith is a nice old shotgun, and is fine for shotgun use, but i don't consider the action strong enough, and the hook up is pritty frgile for rifle use. Like the 311 Savage becomes a self opener in many cases!

The larger chamberings have been done many times, the whole idea of the .22 LR, or Hornet was simply because it is sledom done, and is an oddity. Additionally, it can be done, litterly, on any action, because of the lack of high pressures!