for me, its about a 8. I think it hits very nice....keeps pins low and moving. But the actual lane reaction......I was expecting a bit earlier read, even maybe a stronger midlane. I actually got too much skid snap reaction with mine. With a surface adjustment, I can use it on heavier oil. My Agent Orange gives me a stronger midlane. But all in all....I do like the Dynamo, just have to use it on the right condition.