Yes, put it perpendicular to a log of similar size so you can stand on that log too, if your not comfortable with the reach slip a chunk of wood under the end furthest from your feet so the cut end is angled up. If you can get the round cocked at about a 45 degree angle or little less is a good position. play around on my wood pile to find two logs near the base that have the right spacing to set my rounds on to get the setup I described. I only use this for the stubborn rounds that don't want to split normally because it's not efficient for large volume.
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I will add, another round is not enough support. I wouldn't try it on anything less than a full size log. I do it at the base of my log pile where the logs have no chance of moving from the impact I create.