Why not just use a double bit axe?
Honestly, it's because if your going to do anything more than just a one on one shoot too "split the ball,,
, a double bit axe stuck in the end of a log is the hardest thing to
maintain during a competition with a "split the ball" as an event.
Settin that blade hard and deep in the sawed end of a log is easy to do the first time, when it's all stand up like split'n,,
,but you lay that log down with the axe in it, set up the split target base with nails, then start smacking it side to side with "near miss" shot's.
Guess what? That blade fall's out. Every time.
It's nearly impossible for someone to straddle that log lay'n on the ground with both feet and swing the axe to the exact position without "cant or cast".
"Split the ball" is the same as "cut the string" and "cut the card" or "snuff the candle".
It's all horizontal.
Just put the front blade on the target, use proper trigger and don't "peek" or flinch, aka; follow through