You better be drilling holes in a rock cause you’re going to blow it up. It’s easier than excavators.
They're for plugs and feathers
. If those don't work, then it's microblasters.
It takes an hour to hammer drill a 1/2" hole 4" deep in this rock. I'm not excited about drilling a 1-1/2" one 18" deep for Dexpan.
Get a heavier/more powerful drill then......