The way I understand it, as picking up most of the information here from Justin, who was sharing information gleaned from the bowlingchat.net forum is:
Asymmetric cores flare the same amount within that range; they maintain tilt longer with shorter pin-to-PAP distances versus getting into more forward roll as you head toward the 6" mark.
Symmetrical cores experience the maximum amount of flare as you move toward 3 3/8", and the flare starts to decrease as you increase the pin-to-PAP distance from there. For me, I visualize the core as being the most out of balance at 3 and 3/8" (or the point at which the pin is exactly halfway between the initial track and the PAP). The core will tend to get to balance point as you move away from that point: shortening the pin-to-PAP distance puts the block into more of a barrel-roll position; increasing the distance stands the core up, so that it tends to flip end over end.
Does this help?
Thanks for the information. I got most of it clearly.
So in other words, shorter pin to pap on Asymm balls would result a longer tilt which can translate to longer transition time for phase 1 and/or phase 2 due to a barrel-roll scenario instead of flipping?
Perhaps this explains why my previous raptor drill plays funny at 3".