Ever noticed how Knucklehead have a thing for stair ramps?
If there's such a thing as "hardcore grind" that would be it. They somehow remind me of Senseless Apocalypse except their sound is blown up a bit with nice hooks for the mosher in you. They also seem to take the punk rock more seriously.
On second thought, Knucklehead are hardcore thrashing skaters who grind ramps beyond recyclability. Wood versus metal equals in bone loss.