There is an upgrade to the Tiger?
I bet your ball is either oil logged or that the surface has gotten too dull leading to lack of energy at the pocket.
8 -10 s are often a result of roll out. This can easily happen as one bowls a pearl ball starts to gravitate to 600 grit over time due to friction with the lane.
A rejuvination and resurface may make you think that Tiger is brand new.
Otherwise like said the Showtime pearl is new and available at a proshop near you!
REgards,
Luckylefty