A "Variation" of the null targets...
Is to shoot for palm size groups. Start with slow fire and keep your groups of a size you can cover with the palm of your hand... Gradually speed up, always trying to stay within the original palm size group... If rounds start to spread, slow down. If no spread, speed up...
Over time, you're running through a coupls full mags at speed, and have a fist size hole in the target...
And then, if you're like me, you don't shoot often enough to maintian the skill and need to start over every time you go to the range
