We hit a lot of flat rocks, "channers", in the Western Catskills.  Some big ones as well.  With a wide axle extension, we have had no problems with jamming.  All these and many more were kicked up and out by the Rotary Plow.  The plow bounces off the big ones with no damage.  We use the BCS to work our veg garden as well as to break ground for food plots on upland soil at 2000' elevation.  In this area they say we have "two rocks for every dirt."  The BCS and the chain saw are our only powered implements.