Talk:Weapons/@comment-25525883-20171226172158/@comment-27141730-20171227104540

1.1 pierce = 1 in every 10 shots will pierce through 2 zombies

1.2 pierce = 1 in every 5 shots will pierce through 2 zombies

1.3 pierce = 1 in every 3-4 shots will pierce through 2 zombies

1.5 pierce = every second shot will pierce through 2 zombies

etc

Although with RNG involved, these figures are the average as apposed to exactly what happens.