I took the walk of shame tonight and carried a small load of fresh cut hard oak out to the curb for a free curbside pickup. First time I have been completely skunked on getting a split started, even with three wedges. I managed one slab after starting a groove with my saw, and then that piece was also impossible to split. I thought I had Sawtooth oak, but now I'm pretty sure the pieces I found were Live Oak. I should have studied the brush pile more. I saw one Sawtooth Leaf and commenced to loading. Looks like there was something much harder mixed in.