Oh I think he had plenty of practice. His mother apparently took her children to target practice.
I know... That's why I posted what I did. My point was - he accomplished this by using handguns at close range. Closer range than any target practice, that's for sure. My point was simply that even if he hadn't been familiar with these guns, he still could have done this. His familiarity didn't have a whole lot to do with the number of people he was able to kill - the amount of time he had unhindered to accomplish his murderous plot is what lead to the amount of deaths.
From the teacher saying he was banging on the door of her classroom as she was still hiding kids in the closet, he was fully intent on continuing his rampage. We don't know if he shot himself, or if LE was the one who took him down yet, do we? He may have ended it by shooting himself precisely because the rest of the classrooms were locked down and he had no more potential targets.
Many, many parents take their kids shooting, Hunting, etc... There are over 80,000,000 gun owners in this country. The fact that she had guns, and that she taught her children how to handle them responsibly was not a failing on her part. It's the responsible thing to do if you have a firearm in your home.
[If people aren't seeing this as a "source" of the problem, then I wholeheartedly apologize for mistaking intentions of postings. I'm tired, and I'm used to politics where everyone is always so contentious all the time, and I realize that this may affect how I infer things in other's comments - I'm working on that one!]
ETA: On that note I really am going to say Good Night... My thoughts and prayers are with all of those hurting tonight - especially the families missing their child... I just cannot imagine that pain, and I hope and pray I never have to.