RE: .357 mag lever action for deer?
With a .357 Magnum lever gun, you're looking at approximately the same power (if not a bit more) as the .357 Maximum in a revolver. I'd be looking at 100 yards as a maximum range, and I wouldn't use anything less than full-power 158gr loads either. You might want to do some testing with your ammo first as some .357 bullets can't handle the velocity without fragmenting.