Boulder Buster

To get the most effect out of your booster cartridges, raise them 6" to 12" from the bottom of the hole.   When inserting the cartridges into the hole, once the bottom cartridge strikes the bottom of the hole lift it up by 6" to 12", depending on the depth of the hole.

By having 6" to 12" of water below the bottom cartridge , this water has an amplification effect on the pressure wave created ...