[JPRempe]

Originally Posted by Back In The Saddle

ASA and the bat manufacturers know this. ASA has still approved these bats, therefore they have approved of the ongoing changing characteristics. When the bat is manufactured, the manufacturer is well aware of the changing characteristics. They are a factor in the design of the bat. And as such, are permanently fixed at the time of manufacture.

So if rolling and vicing produce exactly the same characteristics as the manufacturer designed into the bat, and ASA approved, what is the issue?

That's the exact point of the folks who roll/vice their bats. What's the difference?