I read that the PBA has at least 2-3 variants of each pattern on the tour. In addition, they tweak the patterns between seasons.
Below are the total oil volumes of the regular patterns used in the PBA Experience leagues (Brush system) of the USBC:
Cheetah 23.96 mL
Viper 22.34 mL
Chameleon 20.4 mL
Scorpion 22.6 mL
Shark 23.96 mL
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Regards,
jensm