I think you may be missing Gunnut's point.
His position is that every weapon seems to come with a different round count, so how can one magazine be okay for gun 1, but be a hi-cap for gun 2.
The people that propose these asinine labels are the same fools you see doing news clips with civil war rein actors firing their muskets and going on to tell the viewers that the single shot smooth bore was what the founding fathers had in mind when they drafted 2A.
The simple fact is people who don't understand our culture and respect for sport are the ones attempting to govern and police it. We have helped them by not policing ourselves, but they have gone so far overboard they can't even see the ship anymore.
You can't arbitrarily argue that a round count is going to make a difference when a spree killer had made up his mind. If they were smart they would be lobbying for.......ha hah! Your not getting that info out of me suckers.....