From what I can tell pin carry in general is dependent on energy at the pins and angle of entry. I do seem to leave more when I'm throwing weaker cored balls than I do with my stronger stuff differential wise they may just be in my imagination but I'm starting to really believe it. As lower speed bowler like me if somethings a little off it effects us more, we don't get those pins bouncing off the walls or rolling across the lane near as often.
The best suggestion I have found is to try to change my line a little try tightening it up playing more directly and going to ball that has a higher rg and gets down the lane a little farther sometimes help me.
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