If the bowler's PAP is in the normal range, say, greater than 4 1/2" over, then it seems made for medium light oil. This pin will allow less flare than a more normal pin placement, if it is truly over the middle finger. If the bowler's PAP is very low, like 3 1/2" over, then this could still be a strong drilling.
So unless you have the bowler's release specs, it's hard to say what it would really do.
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Bowling: Just like hand grenades and horse shoes, you only have to get close.
Life: Deal with what is.