Hey cross rig up a sling for your little cannon.
It would break up some of that caliche and might be fun.
We've used the 2 1/4" Mountain Howitzer for "Mowing" steep sided berms,..... crammed full of Pea Gravel "Cannister", fired transversely,.....Worked very well, too.
That was back in the time when we were testing a lot of different BPs for the magazine Articles, and there was always LOTS around .
GTC