Lazz's were on larger diameter cases....I want to say like .545 or .565? Something like that.
There is guy over on AR who has created an entire line of big bore wildcats. Rifles, dies, reamers, the whole shebang are quite readily available. He also has a line built on the WSSM. IIRC...9.3, 375, 416, 458, 470, and some form of 500. He then took these, and shot many, many large beasts with them to prove they work. B&M cartridges, worth looking into.
