One of the best things conservatives have on their side, besides the 2nd amendment, is that the libs proposing these idiotic laws have absolutely no knowledge of firearms (except that they are "evil") and this ignorance is constantly displayed in the many ludicrous ideas they propose. And of course they make things up, too. Remember the horrid epidemic of gangs using "Cop Killer Bullets"? You don't remember? Neither do I, but many libs to this day, who can't tell you the difference between the left-wing-invented 'Cop Killer Bullet' and any other high-powered round will insist it's true.
As I am sure you know every caliber you mentioned is ‘handgun’ ammo. I have a .454 Puma lever that will shoot 45LC as well as .454 both of which is ‘handgun ammo’ so as you say the lefties have no idea of firearms.
The scary part is THEY DON’T CARE!! Ban guns = good!