Taking a Bullet Hit

I have been trying for many years to perfect the bullet hit method in all of the films I have been involved in. I have tried the make-shift blood squib technique where you take a condom fill it up with fake blood, tape it to the person and glue a washer and fishing to it and pull. I have also tried the air compressor with red chalk in tubes to get that red mist shot. And lastly I have tried adding it in through post production. All have partially worked. None worked all the way or looked the way I planned them to. I need to perfect this so if you have done this before and you know a cheap way to accomplish this, let me know.