always fly the load.that is get ya head out a watch it.. fly the load as if you are the load and are contolling the helicopter from the load..
if a swing starts stop it. if your watching the load you will be able to read the load and know what its doing
every load is different, by weight or dimensions and will behave differently..
the best way to control it has been stated above, slow down and position the machine over the load,,it works a treat.