In response to some states that previously limited deer hunting to shotguns w/slugs or muzzleloaders but have now expanded the legal definition to include "straight walled' cartridges Winchester has introduced the 350 Legend. I've read that the basic cartridge is the .223/5.56mm that has had the shoulder straightened. So I'm guessing that it is a rimless case holding a .358" bullet and has virtually a straight walled case. I have two questions. 1. does it headspace on the neck ala 30 carbine? and 2. does it have that much advantage over the 357 Maximum. I'd think operationally, the maximum being a rimmed case would have an advantage. What say you?