Nobody is making money from our prisoners, thus nobody wants them in prison.
I guarantee you this is not true. The people making money off prisoners may be making less, and they may not be making power grabs, and they may have an incentive structure that doesn't make them want to screw the system for personal gain, but OF COURSE there are people in your country who make their living off prisoners. Security, Wardens, even the Janitors.
Also, for those arguing about shooting to "wound"
There's no non-lethal way to shoot someone moving to attack you. The only fairly place safe to shoot someone is the foot or the ass, and in a self-defense situation neither would serve you well as justification - a shot to the foot won't stop someone unless you get super lucky (since you WILL miss), and a shot to the ass is obviously not going to be self defense unless it's a Marvel female that's assaulting you.
Also... Britain and Australia with worse crime rates than the states? What? Just going by reported crimes and a cursory search, the US has more than five million more crimes reported than in the UK. Also the highest rate of incarceration of any of the first world countries.
Yes, the UK has worse violent crime rates than the US. The US simply has more people.
(Note, US crime rates are higher overall due to increased drug use crimes, and reporting between countries is... generally hard to compare, regardless)
All that said - I'm totally with Max and those arguing training should be more in depth than it is for gun registration - hell, I even liked the comment about making it actually militia worthy - perhaps buying a weapon should put you on call for various milita related duties as well.
I'm against the assault weapon ban though - the legislation was never anything but cosmetic and did basically nothing.
There is no such thing as "stopping power" a bullet either hits some vital anatomy and is instantly fatal or it doesn't. The kinetic energy of a bullet impact is no worse then the recoil of the gun itself. If a bullet had the energy to knock somebody down, it'd knock down the shooter as well.
You... don't actually have experience with... I don't even know how to respond to your posts. The shooter is clearly braced and prepared for the impact - the target, if moving towards you, probably won't be. And a bullet that puts all its force into the body instead of passing through will obviously be more likely to slow and destabilize a target, simple because more damage is likely to be done (assuming same amount of kinetic force and same target area) than if the bullet passed through. Seriously, this is like arguing that hitting you in the head with a solid wood plank couldn't have any stopping power because if it did it would knock over the person swinging. It's just kind of absurd.
Regardless, most stopping power doesn't come from sheer kinetic force, or necessarily from an increase in lethality, but is a combination of a variety of factors and effect, the end result being "bullets that are better than other bullets at incapacitating".