For the range, I shoot whatever I can find. Right now, I am shooting 180 gr White Box. American Eagle is my favorite, but hard for me to find right now.
I load all 3 of my 40's (22,23,27) with 135 gr CorBon hollow points. I like fast flying rounds and the 135's will fly at 1325 fps out of the 22 and 23 and around 1275 out of the 27.
One of the good things about Glock pistols, they are not ammo sensitive. They re like a hungry lion, they eat anything you throw at them.