I just got my new rapid fire and the first thing I did after putting it together was find a big nasty piece oak croch it was a three way it split it took two shots but it sliced through the middle of it next piece was a big cherry knot same thing two hits and sliced rite through so I went to the Normal stuff and wow the speed is amazing really fast 20 min to fill the back of my short bed truck and I wasn't moving fast at all I did find one piece that it wouldn't split but it was in my basement for 2 yrs because my fathers hydro log splitter couldn't do it ill keep this updated with the good and bad any questions feel free to ask