".. And it's hard to pull that buckshot back if you've made a mistake."

...and if widespread ownership of various firearms is allowed & encouraged, we will be reading about more & more 'mistakes'. Training in how to load & pull the trigger is easy: training in good judgment and restraint is not.
   We just had a police officer in this area kill one man and wound another at the policeman's home...they were delivering furniture! and there was some sort of silly dispute. This was the 4th or 5th time this guy had been in hot water for brandishing his gun and making threats.
   Imagine regular folks, already nervous about harassment & robberies 'defending' themselves by waving a gun every time someone looks at them funny.