I have only killed deer and black bear with lever guns. I own 4 30-30s, 308, 356, 35 Rem, 348, 444, and 45-70.

They all work. BUT, IMO every one of said cartridges is more effective than the 30-30 by a noticeable margin. They just hit harder, and you can not only see it at the shot, but at the damage done on the carcass as well. Dead is dead. But bigger is bigger. On larger game it would make more of a difference.....