I have a Puma lever in .480. It is stainless with a 20 inch bbl. With 20gr of H110 and a 410gr WFNGC Cast Performance bullet it gets right at 1300 fps. Fun rifle, components for reloading: powder, bullets, brass, at least around here, are hard to find or non existent.

'Often mistaken, never in doubt'

'Ignorance more frequently begets confidence than does knowledge' Darwin