I'll say it again, Leeched off some dude off GunzFactor.
For lazy people who cba to go find out for themselves.
10-30 Ping: With this ping your shots will hit almost exactly
where you aim. Try to aim at the centre of the chest or feet.
30-50 Ping: With this ping try to aim at the outline of
the enemy's body. (Example: If your enemy is dashing left,
shoot the left side of their body)
50-80 Ping: With this ping aim about a body's length
ahead of the enemy. (Example: If your enemy is dashing left,
pretend there is a clone of the enemy on the left of the enemy,
aim for the clone.)
80-100 Ping: With this ping aim about two body's length
of the enemy. (Example: If your enemy is dashing left, pretend
there is two clones of the enemy standing side by side on the
left of the enemy, shoot the clone on the far left)
100-150 Ping: With this ping aim about three and a half's
body length of your enemy. (Example: If you enemy is dashing
left, pretend there is three and a half clones of the enemy standing
side by side to the left of the enemy, shoot the far left clone.)
Hope it helps.