Yes, a bit of practice would be wise. Practice shooting, and also practice bringing the gun up fast.
I remember that story about a jeweler out in California who had to shoot three or four attempted robbers, who just wouldn’t stop trying to hold up his store and kill him. He had a couple of handguns laid out where they would be handy.
If one holdup man came into this guy’s liquor store, it’s not unlikely that there may be a repeat.
Lance Thomas, CA watchmaker and retailer. His story is one of an incredibly brave and persistent patriot and citizen who truly dealt lethally with his predator thugs... and with training and smarts. God bless him. He’s amazing.
http://www.survivalistboards.com/showthread.php?p=607140