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......