Thanks Pap.  
That sounds like a nice setup.  Keeps it simple.
And I couldn't agree more:
...Bullet placement... One shot, one kill.
I taught my sons the same.  And as corny as it sounds, when I started them in shooting, I used to love to quote that line from The Patriot: "Aim small, miss small."  (If you could only give a beginning shooter one piece of advice, you could do worse than that little tidbit).
Thanks, Gary