This is a game we do with rifles, but by adjusting the range it works equally well for pistols.
7-up
What you need=
7 medium sized boxes (copy paper cases work great, something at least 10x10x10
100ct. (at least) bag of 10" party balloons
Tape, marker, staple gun
Set up=
Using magic marker, paint, tape, whatever...number the boxes 1 thru 7. Large enough to be easily seen from 25-30 yards.
Inflate and attach a balloon to each box (tape or staple gun.)
The "shooter" turns his back to the range and the others place the boxes down range, mixing up the order. Usually about 5-7 feet apart at various ranges between 5-20 yards. Just make sure not to align any two targets from the shooters point of view. (which is harder to do if you add movement later)
The shooter starts with his pistol holstered (sometimes we start with loaded pistols, sometimes unloaded. Just to mix it up.)
When "go" is called, the shooter must turn and shoot the targets sequentially as fast as he can. Shooting out of order de-qualifies the shooter for that round. We also limit the number of cartridges to 10 per magazine, which makes a reload necessary if too many misses. (you could limit it to 7 per mag if you like.) This is basically the time penalty for poor accuracy.
Fastest time wins that round and gets a point. We usually shoot quite a few rounds and add up the points at the end of a range session. Prize is usually just bragging rights...I rarely win the handguns tho
As I said, we usually shoot this game with tactical rifles.
We have mixed it up by making shooters move to different positions, ie. shoot targets 1-4 from one spot and run to another for the last 3. Different shooting positions, go prone for the last one for example.
We sometimes add a different colored balloon as "no shoot" targets to be skipped. Or shoot the red balloons from prone, blue from kneeling, yellow from standing, etc.
Tons of variations of ranges, number of targets, move and shoot, etc.
We keep the ranges shorter to make the game more about judgement and quickness than it is about precision. Besides, a 10" target is pretty close to upper torso sized.