DRM, sorry I missed your point there. I wish I had kept my 45/70 now. I agree with the thought that you hear fewer shots in a rifle area.
I disagree with dverna about the buckshot. I've hunted thickets on public land in shotgun only areas. A full third of the "hunters" round here need to go through another hunter safety course. JMO
I think some guys just want to hunt with their AR. I'm not sure an AR would feed a big flat boolit up that feed ramp.