Winchester will be bringing out the .480 Ruger next year in their Traditional and traditional CW line of Model 1894's. That .454 would be something, wouldn't it? I think the pressure (50,000 PSI PLUS) is too much for any existing lever action. The .45 Colt in a lever gun don't have no fleas on it... A 300gr bullet at about 1800 fps. That is the front yard of the .45-70!! Try one of those before you ask for more. It's got enough kick for me. That's about the recoil level I hold my .444 to; beyond that I flinch too much.