On a related note, this was good info for noob (me) pistol training.
http://www.targetshooting.ca/docs/pistol_sighting.pdf
http://www.targetshooting.ca/docs/Pi...t_Analysis.pdf
http://www.targetshooting.ca/docs/grp-analysis.pdf
http://www.targetshooting.ca/docs/shooting_faults.pdf
and the army pistol training book (save as)
http://www.giwera.pl/pliki/pmtg.pdf
Also i found tons of articles by expert target shooter, and a few nice printable targets all using google.
tip: some articles (about real gun practice) say to dry fire the gun.
DO NOT dry fire airsoft it will ruin your gun over time.