I also load light powder charges...usually about halfway between starting and max book charge. It cycles the pistol well, reduces recoil, and doesn't mess with aim significantly vs. carry ammo. Brass life is greatly improved too. Experiment with seating depth and try to load on the long side.
The Lee factory crimp die is your friend for all autoloading pistol ammo.
I'm one of those crazies that reloads his Glock 40 too.
Don't push this cartridge and you'll have a long and happy reloading career.
