After looking on bowl.com, it would seem to me that 6 games is not enough to qualify that average as "legal".
There were several different time frames mentioned for different things ( such as awards, etc..) with the lowest number of games beng mentioned for anything at 12 games.
Most tournaments will "Re-Rate" you if you bowl a significant amount over your stated average anyway.
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Norm Duke was right Good transactions list in my profile
My Bowl.com member page