I went from 15 to 14 several years back, and really didn’t see much difference, if any at all.
It did not naturally increase, or decrease, my ball speed. It didn’t make my carry any better, or any worse, just “differentâ€. Those light garbage time shots didn’t fall as often, but I threw less of them because the lighter weight allowed me to be more precise, and the flush hits carried just as well.
Threw them for years. Just got my hands on a couple of 15’s, and haven’t noticed them carrying any better than my 14’s.
I’ve shot 300 with both weights, shot 700’s with both weights, and oddly enough, the only 800 I ever shot was with a ball that weighed 14lb 10oz. Not sure whether to call it a heavy 14, or a light 15.
For me, it always seemed to be more about getting the ball to fit me and come off my hand correctly than it was about whether it weighed 14 or 15 pounds.
Now, I do want to qualify it by also saying that I never used a urethane or plastic ball (as a strike ball) that weighed less than 15 pounds. When you change coverstocks and lose that backend reaction, and start to rely more on the sheer force of impact, then it did seem to make a much bigger difference.
For me, the reactives did not seem to nearly as much.