I would say that depends on the type of Bits they were using,if the "pounders"are so great how come the people who drill oil wells use rotary heads....a pounder will go no where near as deep or as fast as a rotary...at least not where I live....A "pounder" would take about a week to go down to 200' and then they really start to slow down when it gets that deep,the rotary rig that was used here drilled 509' 8"wide hole in 24 hours total drilling time and believe me he went through a lot of rock,and he/they drilled more wells than anyone else around here.